[Docs] prepare changelog for 0.27.0 release

[merobi-hub]

Signed-off-by: Michael Robinson [email protected]

Problem

The changelog needs updating for 0.27.0.

Solution

This PR updates the changelog for the release.

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've updated the CHANGELOG.md with details about your change under the "Unreleased" section (if relevant, depending on the change, this may not be necessary)
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[codecov]

Codecov Report

Merging #2187 (84555e8) into main (6f3a7aa) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #2187   +/-   ##
=========================================
  Coverage     76.67%   76.67%           
  Complexity     1144     1144           
=========================================
  Files           219      219           
  Lines          5312     5312           
  Branches        421      421           
=========================================
  Hits           4073     4073           
  Misses          764      764           
  Partials        475      475           

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[wslulciuc]

LGTM ❤️ 🚀