feat: add 261 version api versions list

[b-matteo]

Description

Adding the 261 api version to the backend's api versions list.

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have reviewed my changes before submitting this pull request.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[RobPasMue]

Small comments - apart from that LGTM!

[RobPasMue]

Silly me... all good! 😄

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.35%. Comparing base (b5e3da8) to head (4232a19).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1980   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files         123      123           
  Lines        9830     9833    +3     
=======================================
+ Hits         8882     8885    +3     
  Misses        948      948           

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