Update CHANGELOG.md

CHANGELOG.md

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 # Change log
 
+## 8.1.0
+
+### New Features
+
+* Switching to the creating forms in the `PDF` format
+* Added the ability to disable the 'Connect to cloud' section via the `--lock-portals` key
+* Added a window to restart the application if the settings marked with the asterisk are applied
+* Added the ‘Use graphics acceleration’ option to the application settings
+* Added the progress of unpacking downloaded update to the `About` page (Windows)
+* Added the ability to open a file by specifying its name in the terminal (Linux)
+* Updated images for the error pages 
+* Added the translation into Serbian (sr-Latn-RS, Serbian (Latin, Serbia and Montenegro))
+* Added a button to select a local file in the hyperlink insertion dialog window
+* Changes in program interface: manageable functional buttons, Replace button is now on the Home tab, Copy style, Clear style, Select all
+* Autoshape shadowing settings
+* Updated the set of color themes available in editors
+* Added internal help in Portuguese (pt-BR)
+* Added Arabic to all regional settings
+* Added a title and a button to close the panel to the `Chat` panel
+
+#### Document Editor
+
+* New button on the top toolbar for changing document editing mode: `Editing`, Reviewing, Viewing
+* Added tooltips for new or updated functionality (displayed when loading the editor or when switching to the corresponding tab) 
+* Implemented the ability to set the format for page numbering
+* Added support for the page color
+* Updated built-in paragraph styles
+* New items in the indents menu for opening the right panel and managing paragraph indents, the ability to manage paragraph indents via the top toolbar
+* Color theme button is now on the Layout tab
+* Mail merge button is now on the Collaboration tab
+* Line spacing options updated
+* Improved work of the algorithm for displaying numbers and punctuation in Arabic text for the Neutral and Weak classes
+* Improved fitting for paragraphs with main `RTL` direction
+
+#### Spreadsheet Editor
+
+* New languages added: ligature support
+* Selected cells are highlighted on their respective row/column numbers
+* New functions: `GETPIVOTDATA`, `IMPORTRANGE`
+* New function category: Custom based on jsdoc
+* Version history update: edited cells are highlighted
+* Users get custom protected range cells viewing rights
+* Implemented the ability to copy/move sheets between books in one browser
+* Changed the appearance of the sheet list in the embedded viewer in accordance with the styles of the main spreadsheet editor
+
+#### Presentation Editor
+
+* New slide settings on the right panel: show background graphics, reset background to the theme background, apply settings to all slides
+* Added `Animation` pane
+* Added a mode for editing master slides and templates
+* Updated the player interface for playing audio/video files (Windows and Linux)
+
+#### Forms
+
+* When adding a fixed form, now it is inserted without wrapping in front of the text
+* The color of the Picture placeholder corresponds to the color of the role for this form
+* The thickness of the frame for required fields is now 2px with any zoom
+* Added a button to switch to the editing mode (similar to the button in the editor header) for forms opened in the View or Fill forms mode
+* The presence of this button depends on the integrator's subscription to the onRequestEditRights event and the permissions.edit rights (in case of a viewer)
+
+#### PDF Editor
+
+* Added buttons for switching editing/viewing (annotations) modes to the toolbar and the editor header 
+* Added tooltips for new or updated functionality (displayed when loading the editor or when switching to the corresponding tab) 
+* In the Edit mode, it's possible to add various objects (using the Home and Insert tabs) and configure them using the right panel and context menu
+* Added the ability to add, delete or rotate pages using the context menu and the toolbar
+* Added a mini toolbar for adding annotations when selecting text
+
+#### Security
+
+* Fixed the vulnerability in the fs.folderPath field which allows accessing the file system
+* Fixed vulnerabilities in the PtgName::assemble, PtgNameX::assemble, PtgParen::assemble, PtgRef3d::assemble, PtgList::assemble and PtgArea3d::assemble methods which cause crash when converting XLS to XLSX
+* Fixed the vulnerability in the `CDataStream::ReadEmrTextBase` method which causes crash when converting `ODP` to `PDF`
+* Fixed the vulnerability in the `GlobalsSubstream::UpdateDefineNames` method which causes crash when converting `XLS` to `XLSX`
+* Fixed the vulnerability in the `WorkBookStream::UpdateXti`, `WorkBookStream::UpdateXti`, methods which causes crash when converting XLS to XLSX
+* Fixed Heap Buffer Overflow when converting `EPUB` to `PDF`
+* Fixed the vulnerability in the `CPPTUserInfo::LoadExternal` method which allows writing a file to a folder with restricted access when converting `PPT` to `PPTX`
+* Fixed vulnerabilities which allow reading data from a third-party file when converting `OOXML` to `ODF` and vice versa
+* Fixed Heap Buffer Overflow in the `CSvmFile::Read_META_BMP` method when converting `ODP` to `PPTX`
+* Fixed the vulnerability in the commandSetPassword method which allows setting a password for a document regardless of rights
+
+# Change log
+
 ## 8.0.1
 
 ### Fixes