ci(mergify): upgrade configuration to current format (#18835)

mergify[bot] · web-flow · commit bb3dc2377d9b · 2026-05-06T14:16:48.000+02:00
diff --git a/.mergify.yml b/.mergify.yml
@@ -1,7 +1,7 @@
 queue_rules:
   - name: default
     merge_method: squash
-    conditions:
+    merge_conditions:
       - check-success=integrations/pr-merge
 
 defaults:
