Fix benchmarks runners (#10265)

Author: dcherian

.github/workflows/benchmarks-last-release.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   benchmark:
     name: Linux
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     env:
       ASV_DIR: "./asv_bench"
       CONDA_ENV_FILE: ci/requirements/environment.yml

.github/workflows/benchmarks.yml

@@ -12,7 +12,7 @@ jobs:
   benchmark:
     if: ${{ contains( github.event.pull_request.labels.*.name, 'run-benchmark') && github.event_name == 'pull_request' || contains( github.event.pull_request.labels.*.name, 'topic-performance') && github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch' }}
     name: Linux
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     env:
       ASV_DIR: "./asv_bench"
       CONDA_ENV_FILE: ci/requirements/environment.yml