[vividus] Add Java 21 migration notice

[valfirst]

No description provided.

[github-actions]

Qodana Community for JVM

It seems all right 👌

No new problems were found according to the checks applied

💡 Qodana analysis was run in the pull request mode: only the changed files were checked
☁️ View the detailed Qodana report

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[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (1b0d6cc) 97.42% compared to head (93ccca8) 97.37%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
...c/main/java/org/vividus/configuration/Vividus.java	25.00%	8 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #4809      +/-   ##
============================================
- Coverage     97.42%   97.37%   -0.05%     
  Complexity     6593     6593              
============================================
  Files           918      918              
  Lines         18993    19005      +12     
  Branches       1269     1270       +1     
============================================
+ Hits          18503    18506       +3     
- Misses          384      392       +8     
- Partials        106      107       +1     

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[sonarqubecloud]

Quality Gate failed

Failed conditions
31.2% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud