Update pull request template

Author: Archmonger

.github/pull_request_template.md

@@ -1,18 +1,15 @@
-## Summary
-
-<!-- Describe these changes -->
-
 ## Issues
 
 <!-- Describe or link the issues this change resolves -->
 
 ## Solution
 
-<!-- Describe how these changes resolve the aforementioned issues -->
+<!-- Describe how these changes resolves the issues -->
 
 ## Checklist
 
 -   [ ] Tests have been included for all bug fixes or added functionality.
 -   [ ] The `changelog.rst` has been updated with any significant changes.
+-   [ ] The documentation has been updated, if needed.
 
 <sub>By submitting this pull request you agree that all contributions are made under this project's open source license(s).</sub>