[Docs] Add/fix changelog entries for version 3.13.1.

[gmarciani]

Description of changes

Add/fix changelog entries for version 3.13.1.

Tests

Approved by PM

References

• Link to impacted open issues.
• Link to related PRs in other packages (i.e. cookbook, node).
• Link to documentation useful to understand the changes.

Checklist

• Make sure you are pointing to the right branch.
• If you're creating a patch for a branch other than develop add the branch name as prefix in the PR title (e.g. [release-3.6]).
• Check all commits' messages are clear, describing what and why vs how.
• Make sure to have added unit tests or integration tests to cover the new/modified code.
• Check if documentation is impacted by this change.

Please review the guidelines for contributing and Pull Request Instructions.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.50%. Comparing base (98c689e) to head (08ff1e8).
Report is 30 commits behind head on release-3.13.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-3.13    #2957   +/-   ##
=============================================
  Coverage         75.50%   75.50%           
=============================================
  Files                23       23           
  Lines              2356     2356           
=============================================
  Hits               1779     1779           
  Misses              577      577           

Flag	Coverage Δ
unittests	75.50% <ø> (ø)

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