fix template workflows (#342)

Author: komura-c

.github/issue_template.md

@@ -1,7 +1,10 @@
+name: PR Agent
 on:
   pull_request:
     types: [opened, reopened, ready_for_review]
   issue_comment:
+    types: [created]
+
 jobs:
   pr_agent_job:
     if: ${{ github.event.sender.type != 'Bot' }}