ci(mergify): upgrade configuration to current format (#611)

Co-authored-by: Mergify <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Brandon Rajkowski <[email protected]>

.mergify.yml

@@ -1,18 +1,18 @@
 queue_rules:
   - name: default
+    queue_conditions:
+      - author=dependabot[bot]
+      - check-success=Build
     update_method: merge
     merge_conditions:
       - check-success=Build
+    commit_message_template: |-
+      {{ title }} (#{{ number }})
+      {{ body }}
+    merge_method: squash
 
 pull_request_rules:
   - name: automatic merge for Dependabot pull requests
-    conditions:
-      - author=dependabot[bot]
-      - check-success=Build
+    conditions: []
     actions:
       queue:
-        name: default
-        method: squash
-        commit_message_template: |-
-          {{ title }} (#{{ number }})
-          {{ body }}