update PR template

[Borda]

What does this PR do?

update PR template according to actual release strategy...

Before submitting

• Was this discussed/approved via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure your PR does only one thing, instead of bundling different changes together? Otherwise, we ask you to create a separate PR for every change.
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?
• Did you verify new and existing tests pass locally with your changes?
• If you made a notable change (that affects users), did you update the CHANGELOG?

PR review

Anyone in the community is free to review the PR once the tests have passed.
Before you start reviewing make sure you have read Review guidelines. In short, see the following bullet-list:

• Is this pull request ready for review? (if not, please submit in draft mode)
• Check that all items from Before submitting are resolved
• Make sure the title is self-explanatory and the description concisely explains the PR
• Add labels and milestones (and optionally projects) to the PR so it can be classified; Bugfixes should be including in bug-fix release milestones (m.f.X) and features should be included in (m.X.b) releases.

Did you have fun?

Make sure you had fun coding 🙃

[codecov]

Codecov Report

Merging #5206 (2b7fbdf) into master (c479351) will increase coverage by 4%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #5206    +/-   ##
=======================================
+ Coverage      89%     93%    +4%     
=======================================
  Files         134     134            
  Lines        9942    9932    -10     
=======================================
+ Hits         8873    9246   +373     
+ Misses       1069     686   -383