Skip building the docs as stardoc is not loaded for workspace-based builds

Author: shs96c

.github/workflows/tests.yaml

@@ -43,6 +43,6 @@ jobs:
           disk-cache: true
           # Share repository cache between workflows.
           repository-cache: true
-      
+
       - name: bazel test //... (Java ${{ matrix.java-major-version }})
-        run: bazelisk --bazelrc=.github/workflows/ci.bazelrc test ${{ matrix.flags }} //...
+        run: bazelisk --bazelrc=.github/workflows/ci.bazelrc test ${{ matrix.flags }} //... -- -//docs/...