ci: Fix a missing trailing slash in the documentation

.github/workflows/rocky8_build.yml

@@ -89,7 +89,7 @@ jobs:
           command: curl -v -F "key=${{ secrets.PREBUILT_CACHE_SECRET }}" -F "commit=$BUILD_COMMIT" -F "date=$BUILD_DATE" -F "platform=centos-8" -F "build_type=${{ inputs.release_type }}" -F "file=@$GITHUB_WORKSPACE/chimerax.rpm" https://preview.rbvi.ucsf.edu/chimerax/cgi-bin/upload_build.py
       - name: Tar the docs directory
         run: |
-          rsync --delete -az --exclude user ChimeraX.app/share/docs chimerax-docs
+          rsync --delete -az --exclude user ChimeraX.app/share/docs/ chimerax-docs
           rsync --delete -az --copy-links vdocs/user chimerax-docs
           tar -cvzf chimerax-docs.tar.gz -C chimerax-docs/ .
       - name: Upload the documentation