[skip ci] Fix test passed for title skip ci (#6869)

* add test passed for title skip ci
Signed-off-by: NThreadDao <yufen.zong@zilliz.com>

* add test passed for title skip ci
Signed-off-by: NThreadDao <yufen.zong@zilliz.com>

* fix test passed for title skip ci
Signed-off-by: NThreadDao <yufen.zong@zilliz.com>

.github/mergify.yml

@@ -52,7 +52,7 @@ pull_request_rules:
   - name: Test passed for title skip ci
     conditions:
       - base=master
-      - title~=[skip ci]
+      - title~=\[skip ci\]
     actions:
       label:
         add: