chore(mergify): if an autobump fails, request a review (#636)

.mergify.yml

@@ -49,7 +49,7 @@ pull_request_rules:
         strict: smart
       label:
         add: ["auto merged"]
-  - name: Automatically merge kork autobump PRs on CI success
+  - name: Automatically merge autobump PRs on CI success
     conditions:
       - base=master
       - status-success=build
@@ -61,3 +61,12 @@ pull_request_rules:
         strict: smart
       label:
         add: ["auto merged"]
+  - name: Request reviews for autobump PRs on CI failure
+    conditions:
+      - base=master
+      - status-failure=build
+      - "label~=autobump-*"
+      - base=master
+    actions:
+      request_reviews:
+        teams: ["oss-reviewers"]