chore(template): add note for code generated by a coding agent in PR template

Author: m-houston

.github/PULL_REQUEST_TEMPLATE.md

@@ -25,6 +25,7 @@
 - [ ] I have added tests to cover my changes
 - [ ] I have updated the documentation accordingly
 - [ ] This PR is a result of pair or mob programming
+- [ ] This PR includes code generated by a coding agent
 
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