change cmd

Author: JoeWang1127

.github/scripts/hermetic_library_generation.sh

@@ -106,7 +106,7 @@ docker run \
   --current-generation-config-path="${workspace_name}/${generation_config}" \
   --api-definitions-path="${workspace_name}/googleapis"
 
-python hermetic_build/release_note_generation/cli/generate_release_note.py generation \
+python hermetic_build/release_note_generation/cli/generate_release_note.py generate \
   --baseline-generation-config-path="${baseline_generation_config}" \
   --current-generation-config-path="${generation_config}"