chore: update pull request template

Author: j-zimnowoda

.github/pull_request_template.md

@@ -1,7 +1,12 @@
-## Checklist
+## 📌 Summary
 
-- [ ] Architecture Design Records have been added as `adr/*.md` and appended to list in `adr/_index.md`, if applicable.
-- [ ] The `values-schema.yaml` file and `test/**` fixtures have been updated to reflect code changes, if applicable.
-- [ ] The OpenApi Schema from redkubes/otomi-api project is compatible with definitions from `values-schema.yaml` file, if applicable.
-- [ ] Helm releases are meeting otomi's baseline security policies, if applicable.
-- [ ] Helm chart and helmfile changes are tested against upgrade scenario, if applicable.
+<!-- What does this PR do? Why is it needed? -->
+
+## 🔍 Reviewer Notes
+
+<!-- Anything you'd like reviewers to focus on (e.g., tricky logic, edge cases)? -->
+
+## 🧹 Checklist
+
+- [ ] Code is readable, maintainable and robust.
+- [ ] Unit tests added/updated