chore(deps): bump benchmark-action/github-action-benchmark (#6058)

Bumps [benchmark-action/github-action-benchmark](https://github.com/benchmark-action/github-action-benchmark) from 1.19.3 to 1.20.3.
- [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@v1.19.3...v1.20.3)

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

.github/workflows/longitudinal-benchmark.yml

@@ -41,7 +41,7 @@ jobs:
         run: git config core.hooksPath no-hooks
 
       - name: Store benchmark result
-        uses: benchmark-action/github-action-benchmark@v1.19.3
+        uses: benchmark-action/github-action-benchmark@v1.20.3
         with:
           name: Plutus Benchmarks
           tool: 'customSmallerIsBetter'