Issue-361: Add prudent information about a publishing of checks.

[macetw]

Testing done

### Submitter checklist
- [ ] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [ ] Ensure that the pull request title represents the desired changelog entry
- [ ] Please describe what you did
- [ ] Link to relevant issues in GitHub or Jira
- [ ] Link to relevant pull requests, esp. upstream and downstream changes
- [ ] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[codecov]

Codecov Report

Merging #362 (3838fa3) into master (8d17133) will increase coverage by 0.15%.
The diff coverage is 100.00%.

❗ Current head 3838fa3 differs from pull request most recent head c5c8f01. Consider uploading reports for the commit c5c8f01 to get more accurate results

@@             Coverage Diff              @@
##             master     #362      +/-   ##
============================================
+ Coverage     71.80%   71.96%   +0.15%     
  Complexity      162      162              
============================================
  Files            16       16              
  Lines           532      535       +3     
  Branches         51       51              
============================================
+ Hits            382      385       +3     
  Misses          124      124              
  Partials         26       26              

Files	Coverage Δ
...s/plugins/checks/github/GitHubChecksPublisher.java	94.82% <100.00%> (+0.28%)	⬆️

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