Addressed unpinned-uses zizmor finding.

.github/workflows/benchmark.yml

@@ -19,7 +19,8 @@ jobs:
           path: "."
           persist-credentials: false
       - name: Setup Miniforge
-        uses: conda-incubator/setup-miniconda@v3
+        # Pinned to v3.2.0.
+        uses: conda-incubator/setup-miniconda@835234971496cad1653abb28a638a281cf32541f
         with:
           miniforge-version: "24.1.2-0"
           activate-environment: asv-bench

.github/workflows/check_commit_messages.yml

@@ -8,6 +8,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   check-commit-prefix:
     if: startsWith(github.event.pull_request.base.ref, 'stable/')