Bumped gcr to 3.38.1 to fix a build break.

[PawelWMS]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./SPECS/LICENSES-AND-NOTICES/data/licenses.json, ./SPECS/LICENSES-AND-NOTICES/LICENSES-MAP.md, ./SPECS/LICENSES-AND-NOTICES/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

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Summary

We've recently hit a build break in gcr reported upstream. Bumping gcr to 3.38.1, where the fix was added.

Does this affect the toolchain?

No.

Associated issues

• Bumped gcr to 3.38.1 to fix a build break. #11735

Test Methodology

• Buddy build.
  NOTE: the package never built on 3.0, this PR is just to keep the changes in sync. Build failures will need to be addressed separately.

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Files not reviewed (3)

• SPECS-EXTENDED/gcr/gcr.signatures.json: Language not supported
• SPECS-EXTENDED/gcr/gcr.spec: Language not supported
• cgmanifest.json: Language not supported