git push origin fails if there is nothing to push. (#2291)

.github/workflows/release.yml

@@ -134,10 +134,7 @@ jobs:
         DRY_RUN: ${{ inputs.dry_run }}
       run: |
         # The file was actually changed, we need to commit the changes
-        git diff-index --quiet HEAD || git -c 'user.name=AWS SDK Rust Bot' -c '[email protected]' commit gradle.properties --message "Upgrade the smithy-rs runtime crates version to ${SEMANTIC_VERSION}"
-        echo "Pushing upgraded gradle.properties commit..."
-        # This will succeed even if nothing new was committed
-        git push origin
+        git diff-index --quiet HEAD || git -c 'user.name=AWS SDK Rust Bot' -c '[email protected]' commit gradle.properties --message "Upgrade the smithy-rs runtime crates version to ${SEMANTIC_VERSION}" && git push origin
 
   release:
     name: Release