Merge pull request #863 from certbot/more-checks

Add more specific checkboxes to the pull request template

Author: wgreenberg

.github/pull_request_template.md

@@ -1,3 +1,6 @@
 ## Pull Request Checklist
 
 - [ ] I have carefully read and fully understood the instructions in [the README file](https://github.com/certbot/website/blob/master/README.md), and I attest that this pull request conforms to those instructions.
+  - [ ] I have placed a link in exactly one of {tutorial, announcement, plan}
+  - [ ] If the user must take any additional action to add a certificate, I have set the category to partial
+  - [ ] The note field is not a generic description of the offerings; it notes the language, or which products have full support in an otherwise partial provider. Otherwise, it is empty.