add missing step

Author: alan707

.github/workflows/pull-from-bazel-build.yml

@@ -88,6 +88,9 @@ jobs:
             -zip upstream/bazel-bin/src/main/java/com/google/devtools/build/lib/reference-docs.zip \
             -output reference-docs-temp
 
+      - name: Copy HEAD docs
+        run: ./copy-upstream-docs.sh
+
       - name: Create or update versioned docs folders
         run: ./docs-versions.vendor_folders.sh