Adjust workflows

* Fix job name in trigger.yml. It's not a deploy job.
* Use `pull` instead of `pull_strategy` in `EndBug/add-and-commit`.
  `pull_strategy` has been deprecated.

Author: k-takata

.github/workflows/generate.yml

@@ -43,4 +43,4 @@ jobs:
 
             https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
           branch: gh-pages
-          pull_strategy: 'NO-PULL'
+          pull: 'NO-PULL'

.github/workflows/trigger.yml

@@ -4,7 +4,7 @@ on:
     - cron: '15 11 3 * *'
 
 jobs:
-  deploy:
+  trigger:
     runs-on: ubuntu-latest
     steps:
       - name: Enable each workflow