Update release.yml

Uses https://github.com/bazel-contrib/setup-bazel which doesn't have a reference to XDG_CACHE_HOME.

Fixes https://github.com/bazel-contrib/.github/issues/16
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 43ea4de..37667a1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,8 +11,8 @@
 
 jobs:
   release:
-    # Re-use https://github.com/bazel-contrib/.github/blob/v5/.github/workflows/release_ruleset.yaml
-    uses: bazel-contrib/.github/.github/workflows/release_ruleset.yaml@v5
+    # Re-use https://github.com/bazel-contrib/.github/blob/v6/.github/workflows/release_ruleset.yaml
+    uses: bazel-contrib/.github/.github/workflows/release_ruleset.yaml@v6
     with:
       prerelease: false
-      release_files: rules_proto-*.tar.gz
\ No newline at end of file
+      release_files: rules_proto-*.tar.gz