[ci] Don't use non-bzlmod caches

Author: p0deje

.github/workflows/bazel.yml

@@ -109,6 +109,7 @@ jobs:
         with:
           bazelisk-cache: true
           bazelrc: common --color=yes
+          cache-version: 2
           disk-cache: ${{ inputs.cache-key }}
           external-cache: |
             name: ${{ inputs.cache-key }}

.github/workflows/ci.yml

@@ -24,6 +24,7 @@ jobs:
         uses: bazel-contrib/[email protected]
         with:
           bazelisk-cache: true
+          cache-version: 2
           external-cache: |
             name: ci-check
             manifest: