[cicd] try to fix bazel cache

Author: wangxiyu191

.github/workflows/test-opensrc.yml

@@ -67,7 +67,7 @@ jobs:
           set -e
           bazelisk test //integration_test/... --cache_test_results=no --test_output=errors
           ls -alh ./
-          du -h -d 3 /root/.cache/
+          du -h -d 3 /${HOME}/.cache/
           df -h
 #      - name: Save cache
 #        id: cache-restore