Formulate rule/sample-extensions descriptions consistently

[schalkms]

reference #4384

[codecov]

Codecov Report

Merging #4412 (659ba1b) into main (48a28fc) will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #4412      +/-   ##
============================================
+ Coverage     84.23%   84.28%   +0.04%     
- Complexity     3259     3282      +23     
============================================
  Files           474      474              
  Lines         10323    10429     +106     
  Branches       1825     1861      +36     
============================================
+ Hits           8696     8790      +94     
- Misses          666      670       +4     
- Partials        961      969       +8     

Impacted Files	Coverage Δ
.../gitlab/arturbosch/detekt/rules/empty/EmptyRule.kt	92.30% <0.00%> (-3.15%)	⬇️
...etekt/rules/style/optional/MandatoryBracesLoops.kt	73.33% <0.00%> (-2.53%)	⬇️
...ab/arturbosch/detekt/core/config/ValidateConfig.kt	98.64% <0.00%> (-1.36%)	⬇️
...n/kotlin/io/gitlab/arturbosch/detekt/api/Entity.kt	75.00% <0.00%> (-1.20%)	⬇️
.../gitlab/arturbosch/detekt/api/internal/Versions.kt	87.50% <0.00%> (ø)
...n/io/github/detekt/report/html/HtmlOutputReport.kt	95.55% <0.00%> (ø)
.../arturbosch/detekt/generator/out/AbstractWriter.kt	0.00% <0.00%> (ø)
...rturbosch/detekt/rules/style/StyleGuideProvider.kt	100.00% <0.00%> (ø)
.../detekt/generator/collection/MultiRuleCollector.kt	74.62% <0.00%> (ø)
.../detekt/rules/exceptions/ObjectExtendsThrowable.kt	80.95% <0.00%> (ø)
... and 16 more

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