Use "no version bump" label instead of "no release".

Author: dumptruckman

.github/workflows/require_label.yml

@@ -15,4 +15,4 @@ jobs:
         with:
           mode: exactly
           count: 1
-          labels: "release:major, release:minor, release:patch, no release"
+          labels: "release:major, release:minor, release:patch, no version bump"