ci(mergify): upgrade configuration to current format

mergify[bot] · web-flow · commit 049f294ede5f · 2026-05-11T00:23:45.000Z
diff --git a/.mergify.yml b/.mergify.yml
@@ -1,6 +1,6 @@
 queue_rules:
   - name: default
-    conditions:
+    merge_conditions:
       - status-success=build (compile-linux)
       - status-success=build (compile-windows)
       - status-success=build (compile-darwin)
