Change pull request template to checklist

.github/pull_request_template.md

@@ -1,4 +1,5 @@
-
-Notes: 
-* Make sure you add a `.` to the end of your lines. This is to conform to `awesome-list` linting and requirements.
-* Make sure it's not already on the list. 
+Checklist:
+- [ ] The plugin is specifically build for Neovim.
+- [ ] The lines end with a `.`. This is to conform to `awesome-list` linting and requirements.
+- [ ] It's not already on the list. 
+- [ ] It supports treesitter syntax if it's a colorscheme.