fix: css issue with new DS changes

[rishabhrathod01]

Description

Saw issue with UnsupportedPluginDialog.tsx UI after new DS changes, this PR fixes those css issue

After Fix

Fixes #

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Locally

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Test coverage results 🧪

🟢 Total coverage has increased

// Code coverage diff between base branch:release and head branch: fix/unsupported_plugin_dialog_ui 

Status	File	% Stmts	% Branch	% Funcs	% Lines
🟢	total	54.95 (0)	36.68 (0.01)	33.87 (0)	55.52 (0.01)
🟢	app/client/src/pages/Editor/IntegrationEditor/UnsupportedPluginDialog.tsx	52.27 (1.16)	100 (0)	0 (0)	54.76 (1.27)
🟢	app/client/src/selectors/commentsSelectors.ts	79.84 (1.61)	57.35 (2.94)	70 (0)	86.36 (2.27)

[rishabhrathod01]

/ok-to-test sha=32d85eb