ci(mergify): upgrade configuration to current format

.mergify.yml

@@ -1,16 +1,6 @@
 queue_rules:
   - name: default
-    conditions:
-      # conditions for a PR to get merged (i.e., out of the queue)
-      - base=main
-      - status-success="check c bindings"
-      - status-success="check python bindings (ubuntu-latest, 3.8)"
-      - status-success="check-code-format"
-
-pull_request_rules:
-  - name: rebase and merge when passing all checks
-    conditions:
-      # conditions for a PR to get queued
+    queue_conditions:
       - base=main
       - status-success="check c bindings"
       - status-success="check python bindings (ubuntu-latest, 3.8)"
@@ -21,11 +11,16 @@ pull_request_rules:
       - "#approved-reviews-by>0"
       - "#changes-requested-reviews-by=0"
       - -title~=^\[*[Ww][Ii][Pp]
-    actions:
-      queue:
-        name: default
-        method: merge
-        update_method: rebase
+    merge_conditions:
+      # conditions for a PR to get merged (i.e., out of the queue)
+      - base=main
+      - status-success="check c bindings"
+      - status-success="check python bindings (ubuntu-latest, 3.8)"
+      - status-success="check-code-format"
+    merge_method: merge
+    update_method: rebase
+
+pull_request_rules:
   - name: remove approved reviews when updated
     conditions:
       # conditions for approving reviews to be removed
@@ -37,3 +32,7 @@ pull_request_rules:
         message: |
           All approving reviews have been removed because this pull request
           was updated.
+  - name: refactored queue action rule
+    conditions: []
+    actions:
+      queue: