ci(mergify): upgrade configuration to current format

mergify[bot] · web-flow · commit 34f2b1f511d2 · 2026-04-22T20:49:16.000Z
diff --git a/.github/mergify.yml b/.github/mergify.yml
@@ -5,3 +5,5 @@ pull_request_rules:
     actions:
       merge:
         method: squash
+merge_protections_settings:
+  reporting_method: check-runs
