Release 3.7.0 preparation

[satween]

What does this PR do?

Updates CHANGELOG.md change Snapshot -> Release

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.42%. Comparing base (5e1d6b3) to head (bea71ea).

Additional details and impacted files

@@                Coverage Diff                @@
##           release/3.7.0    #3211      +/-   ##
=================================================
- Coverage          71.58%   71.42%   -0.16%     
=================================================
  Files                933      933              
  Lines              34596    34596              
  Branches            5850     5850              
=================================================
- Hits               24764    24709      -55     
- Misses              8210     8252      +42     
- Partials            1622     1635      +13     

see 33 files with indirect coverage changes

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