Tune up maintenance workflow

* Run weekly
* Meaningful commit message
* Fix ambiguous instructions on triggering checks

Author: bendrucker

.github/workflows/maintenance.yaml

@@ -2,7 +2,7 @@ on:
   push:
     branches: [ master ]
   schedule:
-    - cron: '*/5 * * * *'
+    - cron: '0 0 * * 1'
   workflow_dispatch: # Enables on-demand/manual triggering
 jobs:
   job:
@@ -26,9 +26,8 @@ jobs:
       - uses: peter-evans/create-pull-request@v4
         with:
           commit-message: |
-            autogenerated maintenance
-          title: autogenerated maintenance
+            Update AWS provider/module and generated content
+          title: Update AWS provider/module and generated content
           delete-branch: true
           body: |
-            If tests are stuck on https://github.com/peter-evans/create-pull-request/issues/48:
-            ["Manually close pull requests and immediately reopen them. This will enable `on: pull_request` workflows to run and be added as checks."](https://github.com/peter-evans/create-pull-request/blob/master/docs/concepts-guidelines.md#triggering-further-workflow-runs)
+            This is an automated pull request triggered by GitHub Actions. To trigger check runs, close and re-open it.