Bump benchmark-action/github-action-benchmark from 1.14.0 to 1.15.0 (open-telemetry#3442)

Bumps [benchmark-action/github-action-benchmark](https://github.com/benchmark-action/github-action-benchmark) from 1.14.0 to 1.15.0.
- [Release notes](https://github.com/benchmark-action/github-action-benchmark/releases)
- [Changelog](https://github.com/benchmark-action/github-action-benchmark/blob/master/CHANGELOG.md)
- [Commits](benchmark-action/github-action-benchmark@v1.14.0...v1.15.0)

---
updated-dependencies:
- dependency-name: benchmark-action/github-action-benchmark
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

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

Author: dependabot[bot]

.github/workflows/benchmark.yml

@@ -22,7 +22,7 @@ jobs:
           path: ./benchmarks
           key: ${{ runner.os }}-benchmark
       - name: Store benchmarks result
-        uses: benchmark-action/github-action-benchmark@v1.14.0
+        uses: benchmark-action/github-action-benchmark@v1.15.0
         with:
           name: Benchmarks
           tool: 'go'