Fix merge Yaml file (#24354)

.mergify.yml

@@ -92,16 +92,16 @@ pull_request_rules:
       dismiss_reviews:
         changes_requested: true
   - name: set automerge label on mergify backport PRs
-     conditions:
-       - author=mergify[bot]
-       - head~=^mergify/bp/
-       - "#status-failure=0"
-       - "-merged"
-       - label!=no-automerge
-     actions:
-       label:
-         add:
-           - automerge
+    conditions:
+      - author=mergify[bot]
+      - head~=^mergify/bp/
+      - "#status-failure=0"
+      - "-merged"
+      - label!=no-automerge
+    actions:
+      label:
+        add:
+          - automerge
   - name: v1.9 feature-gate backport
     conditions:
       - label=v1.9