fix exit code

Author: shirshanka

metadata-ingestion/scripts/docgen.py

@@ -828,7 +828,7 @@ def generate(
     print(json.dumps(metrics, indent=2))
     print("############################################")
     if metrics["plugins"].get("failed", 0) > 0:
-        sys.exit(0)
+        sys.exit(1)
 
 
 if __name__ == "__main__":