chore: reinstate cache to see if merely a dirty cache

.github/workflows/bazel.yaml

@@ -27,15 +27,15 @@ jobs:
         # get a key showing the current week (ISO: yyyyWww) allowing older caches to age-out/autoprune
         id: week
         run: echo "::set-output name=iso::$(date +'bazel-%YW%U')"
-      #-
-      #  uses: bazel-contrib/setup-bazel@0.9.1
-      #  with:
-      #    # Cache bazel downloads via bazelisk
-      #    bazelisk-cache: true
-      #    # Store build cache per week
-      #    disk-cache: ${{ steps.week.outputs.iso }}
-      #    # Share repository cache between workflows.
-      #    repository-cache: true
+      -
+        uses: bazel-contrib/setup-bazel@0.8.5
+        with:
+          # Cache bazel downloads via bazelisk
+          bazelisk-cache: true
+          # Store build cache per week
+          disk-cache: ${{ steps.week.outputs.iso }}-XXX
+          # Share repository cache between workflows.
+          repository-cache: true
       - uses: actions/checkout@v4
         # https://github.com/bazelbuild/bazel/issues/11062
       -