Bump rhysd/github-action-benchmark from 1.20.3 to 1.20.4

Bumps [rhysd/github-action-benchmark](https://github.com/rhysd/github-action-benchmark) from 1.20.3 to 1.20.4.
- [Release notes](https://github.com/rhysd/github-action-benchmark/releases)
- [Changelog](https://github.com/benchmark-action/github-action-benchmark/blob/master/CHANGELOG.md)
- [Commits](benchmark-action/github-action-benchmark@v1.20.3...v1.20.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/benchmarks.yml

@@ -25,7 +25,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
         command: "pytest benchmarks/  --benchmark-json output.json"
     - name: Analyse benchmark results for Pull Requests
-      uses: rhysd/[email protected].3
+      uses: rhysd/[email protected].4
       if: ${{ github.ref != 'refs/heads/main' }}
       with:
         name: Matchbox performance benchmarks on Python ${{ matrix.python-version }}
@@ -40,7 +40,7 @@ jobs:
         fail-on-alert: false
         alert-comment-cc-users: '@fizyk'
     - name: Store benchmark result for master branch
-      uses: rhysd/[email protected].3
+      uses: rhysd/[email protected].4
       if: ${{ github.ref == 'refs/heads/main' }}
       with:
         name: Matchbox performance benchmarks on Python ${{ matrix.python-version }}