Update benchmark-action/github-action-benchmark action to v1.20.5 (#809)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/benchmark.yaml

@@ -62,7 +62,7 @@ jobs:
         run: nox -s benchmark
 
       - name: Store benchmark result in github.io
-        uses: benchmark-action/github-action-benchmark@d48d326b4ca9ba73ca0cd0d59f108f9e02a381c7 # v1.20.4
+        uses: benchmark-action/github-action-benchmark@4e0b38bc48375986542b13c0d8976b7b80c60c00 # v1.20.5
         with:
           name: Pytest-Benchmark Benchmark
           tool: "pytest"