chore: 🧑‍💻 update PR template (#7)

## Description

This PR makes the checklist compatible with an example repo.

Closes #6 

<!-- Select quick/in-depth as necessary -->
This PR needs a quick review.

---------

Co-authored-by: Luke W. Johnston <lwjohnst86@users.noreply.github.com>

.github/pull_request_template.md

@@ -1,6 +1,6 @@
-## Description
+# Description
 
-This PR DESCRIBE CHANGES.
+This PR will [DESCRIBE CHANGES].
 
 Closes #
 
@@ -9,6 +9,6 @@ This PR needs a quick/an in-depth review.
 
 ## Checklist
 
-- [ ] Added or updated tests
-- [ ] Updated documentation
-- [ ] Ran `just run-all`
+- [ ] Read through for typos, added new words to the dictionary
+- [ ] Checked that the README is up to date
+- [ ] Resolved any Ruff errors / formatted in Markdown