fix broken link

Author: Sean Wheeler

.github/PULL_REQUEST_TEMPLATE.md

@@ -19,7 +19,7 @@ Version(s) of documents impacted
 
 ## PR Checklist
 
-- [ ] I have read the [contributors guide(https://github.com/MicrosoftDocs/PowerShell-Docs/blob/staging/CONTRIBUTING.md)]
+- [ ] I have read the [contributors guide](https://github.com/MicrosoftDocs/PowerShell-Docs/blob/staging/CONTRIBUTING.md)
   and followed the style and process guidelines
 - [ ] PR has a meaningful title
 - [ ] PR is targetted at the _staging_ branch