Update PR template (#3131)

* Update PR template

---------

Co-authored-by: Ivan <2103732+codebien@users.noreply.github.com>
Co-authored-by: Mihail Stoykov <312246+mstoykov@users.noreply.github.com>

.github/pull_request_template.md

@@ -1,20 +1,31 @@
-<!--
-
-
-  (ﾉ◕ヮ◕)ﾉ*:・ﾟ✧
-  
-  Thank you for your interest in contributing to the k6 project!
-  
-  Before you get started, we'd kindly like to ask you to read our:
-    - Contribution guidelines at https://github.com/grafana/k6/blob/master/CONTRIBUTING.md
-    - Code of Conduct at https://github.com/grafana/k6/blob/master/CODE_OF_CONDUCT.md
-    
-  Out of respect for your time, please start a discussion regarding any bigger contributions either
-  in a GitHub Issue, in the community forums or in the #contributors channel of the k6 slack before you
-  get started on the implementation.
-  
-  If you've already done all of that, you're more than welcome to proceed with your pull request.
-  Thank you again for your contribution! 🙏🏼
-  
-  
+## What?
+
+<!-- A short (or detailed) description of what this PR does. -->
+
+## Why?
+
+<!-- A short (or detailed) explanation of why these changes are made and needed. -->
+
+## Checklist
+
+<!-- 
+If you haven't read the contributing guidelines https://github.com/grafana/k6/blob/master/CONTRIBUTING.md 
+and code of conduct https://github.com/grafana/k6/blob/master/CODE_OF_CONDUCT.md yet, please do so
 -->
+
+- [ ] I have performed a self-review of my code.
+- [ ] I have added tests for my changes.
+- [ ] I have run linter locally (`make ci-like-lint`) and all checks pass.
+- [ ] I have run tests locally (`make test`) and all tests pass.
+- [ ] I have commented on my code, particularly in hard-to-understand areas.
+<!-- - [ ] Any other relevant item -->
+
+## Related PR(s)/Issue(s)
+
+<!-- - <https://github.com/grafana/...> -->
+
+<!-- Does it close an issue? -->
+
+<!-- Closes #ISSUE-ID -->
+
+<!-- Thanks for your contribution! 🙏🏼 -->