Bump codecov/codecov-action from 4.6.0 to 5.1.2 (#447)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4.6.0 to 5.1.2.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@b9fd7d1...1e68e06)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/test.yaml

@@ -71,7 +71,7 @@ jobs:
           service: opentelemetry-mapping-go
           files: testresults/
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # 4.6.0
+        uses: codecov/codecov-action@1e68e06f1dbfde0e4cefc87efeba9e4643565303 # 5.1.2
         if: startsWith( matrix.go-version, '1.22' )
         with:
           token: ${{ secrets.CODECOV_TOKEN }}