[AUTO] Add release notes for 3.7.0

[opensearch-ci-bot]

Add release notes for 3.7.0

Borderline Calls

• Add issues write permission to untriaged label workflow #941: Placed in Infrastructure — could also be Maintenance, but chose Infrastructure because it modifies a CI workflow file.
• Fix CVE-2025-67030: Pin org.codehaus.plexus:plexus-utils to 4.0.2 #942: Placed in Maintenance — borderline with Bug Fixes since it fixes a CVE, but chose Maintenance because it's a dependency version pin/update rather than a code fix.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.43%. Comparing base (9cb092f) to head (4284e09).
⚠️ Report is 62 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #945      +/-   ##
============================================
- Coverage     70.88%   70.43%   -0.45%     
- Complexity      421      524     +103     
============================================
  Files            49       56       +7     
  Lines          3125     3663     +538     
  Branches        194      244      +50     
============================================
+ Hits           2215     2580     +365     
- Misses          785      920     +135     
- Partials        125      163      +38     

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