ci(mergify): upgrade configuration to current format

Author: mergify[bot]

.mergify.yml

@@ -1,15 +1,17 @@
 queue_rules:
   - name: default
+    queue_conditions:
+      - base=master
+      - label~=merge-queue|dependencies
     merge_conditions: []
+    merge_method: rebase
 defaults:
   actions:
     queue:
       allow_merging_configuration_change: true
-      method: rebase
+
 pull_request_rules:
-  - name: merge using the merge queue
-    conditions:
-      - base=master
-      - label~=merge-queue|dependencies
+  - name: refactored queue action rule
+    conditions: []
     actions:
-      queue: {}
+      queue: