chore: Update pull request template

Add pull request title check box

Author: chawyehsu

.github/pull_request_template.md

@@ -8,8 +8,11 @@
   Read the contributing guide first to save both your and our time.
 -->
 
+<!--
 Closes #XXXX
-<!-- or -->
+or
 Relates to #XXXX
+-->
 
-- [ ] I have read the [Contributing Guide](https://github.com/ScoopInstaller/.github/blob/main/.github/CONTRIBUTING.md).
+- [ ] Use conventional PR title: `<manifest-name[@version]|chore>: <general summary of the pull request>`
+- [ ] I have read the [Contributing Guide](https://github.com/ScoopInstaller/.github/blob/main/.github/CONTRIBUTING.md) <!-- where the first check box is documented, in case you don't read. -->