docs: Update PR template (#937)

.github/pull_request_template.md

@@ -1,9 +1,11 @@
 Checklist:
 
-* [ ] Either (a) I've created an [feature request](https://github.com/argoproj/argo-events/issues/new/choose) and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
-* [ ] The title of the PR is (a) [conventional](https://www.conventionalcommits.org/en/v1.0.0/), (b) states what changed, and (c) suffixes the related issues number. E.g. `"fix(controller): Updates such and such. Fixes #1234"`.  
-* [ ] I've signed the CLA.
-* [ ] I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
-* [ ] My builds are green. Try syncing with master if they are not. 
 * [ ] My organization is added to [USERS.md](https://github.com/argoproj/argo-events/blob/master/USERS.md).
 
+<!--
+
+Please leave your PR in draft if you don't need a review yet. 
+
+To fix failing `CI / Codegen`, run `make codegen`. 
+
+-->