Update PR Template

[eric-haibin-lin]

Removed code style checking from the template. It is checked by the CI anyway. No PR can be merged without passing this.

[marcoabreu]

Could we add checkboxes to all items in the list?

- Unit tests are added for small changes to verify correctness (e.g. adding a new operator)
would become
- [ ] Unit tests are added for small changes to verify correctness (e.g. adding a new operator)

[szha]

I think the list items are intended as enumeration of possible situations. They usually don't apply all at once.

[eric-haibin-lin]

+1 on sheng's comment

[lebeg]

Could we add a note that not applicable items should be removed from the description? It's sometimes hard to see the actual message between the default text lines

[eric-haibin-lin]

Done

[szha]

@eric-haibin-lin would you add an item to remind the committers to check the API doc of the PR? See details in #9928. It should read like:
Committers should check the API doc at http://mxnet-ci-doc.s3-accelerate.dualstack.amazonaws.com/PR-$PR_ID/$BUILD_ID/index.html. (e.g. link)

[rahul003]

@szha That is nice! Didn't know we were building API docs for each PR.
+1 for adding that

[eric-haibin-lin]

Done

[marcoabreu]

Could we also add an item to remind people linking the JIRA issue?

[eric-haibin-lin]

Done. Although I'm a little bit worried that all these reminders make the template kind of heavy

[marcoabreu]

Agree, we might have to do a proper cleanup of that template and make it more lightweight.