Update actions/cache action to v3

Author: renovate[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v1
 
     - name: Mount bazel cache
-      uses: actions/cache@v1
+      uses: actions/cache@v3
       with:
         path: "/home/runner/.cache/bazel"
         key: bazel