ci(mergify): upgrade configuration to current format

Author: mergify[bot]

.github/mergify.yml

@@ -56,7 +56,6 @@ queue_rules:
   - name: default
     update_method: merge
     allow_queue_branch_edit: true
-    queue_branch_merge_method: fast-forward
     queue_conditions:
       - and:
           - "check-success = DeepSource: Secrets"
@@ -68,3 +67,6 @@ queue_rules:
           - check-success = Check Dependency Compatibility
           - check-success = CodeRabbit
           - check-success = Run Tests
+    merge_method: fast-forward
+merge_protections_settings:
+  reporting_method: check-runs