chore(deps): update dependency protoc-gen-validate to v1.2.1

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
protoc-gen-validate	bazel_dep	minor	1.0.4.bcr.2 -> 1.2.1

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Release Notes

bufbuild/protoc-gen-validate (protoc-gen-validate)

v1.2.1

What's Changed

• Fix Python3.9 build by @​stefanvanburen in https://github.com/bufbuild/protoc-gen-validate/pull/1232

Full Changelog: bufbuild/protoc-gen-validate@v1.2.0...v1.2.1

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Configuration

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This change is 

[dpebot]

/gcbrun

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.90%. Comparing base (0da5012) to head (e9624eb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14994      +/-   ##
==========================================
- Coverage   92.91%   92.90%   -0.01%     
==========================================
  Files        2351     2351              
  Lines      210185   210185              
==========================================
- Hits       195287   195276      -11     
- Misses      14898    14909      +11     

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