update .mergify.yml

[ci skip]

.mergify.yml

@@ -16,9 +16,7 @@ pull_request_rules:
     conditions:
       - author = github-actions[bot]
       - '#approved-reviews-by >= 1'
-      - check-skipped = "test (16.x)"
-      - check-skipped = "test-prod-node14 / launch-prod"
-      - check-skipped = "test-prod-node16 / launch-prod"
+      - label = "prepare next version"
     actions:
       merge:
         method: merge