ci(mergify): upgrade configuration to current format (#425)

Co-authored-by: Mergify <37929162+mergify[bot]@users.noreply.github.com>

Author: mergify[bot]

.github/mergify.yml

@@ -1,23 +1,23 @@
----
 queue_rules:
   - name: default
-    conditions:
+    queue_conditions:
+      - approved-reviews-by=zhaohuabing
+    merge_conditions:
       # Conditions to get out of the queue (= merged)
       - approved-reviews-by=zhaohuabing
+    merge_method: squash
+
 pull_request_rules:
-  - name: Automatic merge on CI success and review
-    conditions:
-      - approved-reviews-by=zhaohuabing
-    actions:
-      queue:
-        method: squash
-        name: default
   - name: ask the maintainer team to review PR
     conditions:
       - and:
-        - label!=invalid
-        - -draft
+          - label!=invalid
+          - -draft
     actions:
       request_reviews:
         users:
           - zhaohuabing
+  - name: Automatic merge on CI success and review
+    conditions: []
+    actions:
+      queue: