chore(templates): update pull request template

.github/pull_request_template.md

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+
+---
+
+### Acceptance Checklist
+
+- [ ] **Story**: Code is focused on the linked stories and solves a problem
+- One of:
+  - [ ] **For Bugs**: A unit test is added or an existing one modified
+  - [ ] **For Features**: New unit tests are added covering the new functions or modifications
+- [ ] Code Documentation changes are included for public interfaces and important / complex additions
+- [ ] External Documentation is included for API changes, or other external facing interfaces
+
+### Review Checklist
+
+- [ ] The code does not duplicate existing functionality that exists elsewhere
+- [ ] The code has been linted and follows team practices and style guidelines
+- [ ] The changes in the PR are relevant to the title
+  - changes not related should be moved to a different PR
+- [ ] All errors or error handling is actionable, and informs the viewer on how to correct it