chore: Improve checklist

Author: peaceiris

.github/ISSUE_TEMPLATE/1_user_support.md

@@ -11,6 +11,7 @@ assignees: peaceiris
 ### Check list before opening this issue
 
 - [ ] I read the latest README
+  - I am using the latest version of this action
   - I checked [Available Options](https://github.com/peaceiris/actions-gh-pages#options)
   - I followed [Tips and FAQ](https://github.com/peaceiris/actions-gh-pages#tips-and-faq)
   - I tried [Workflow Examples](https://github.com/peaceiris/actions-gh-pages#examples)

.github/ISSUE_TEMPLATE/2_bug_report.md

@@ -13,6 +13,7 @@ assignees: peaceiris
 
 - [ ] [GitHub Status](https://www.githubstatus.com/) is good
 - [ ] I read the latest README
+  - I am using the latest version of this action
   - I checked [Available Options](https://github.com/peaceiris/actions-gh-pages#options)
   - I followed [Tips and FAQ](https://github.com/peaceiris/actions-gh-pages#tips-and-faq)
   - I tried [Workflow Examples](https://github.com/peaceiris/actions-gh-pages#examples)