fix new doc clippy lint

[clux]

complaints about https://rust-lang.github.io/rust-clippy/master/index.html#/too_long_first_doc_paragraph as can be seen in other prs: https://github.com/kube-rs/kube/pull/1566/files

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.4%. Comparing base (4c7b2d2) to head (01e09a0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1567   +/-   ##
=====================================
  Coverage   75.4%   75.4%           
=====================================
  Files         80      80           
  Lines       7290    7290           
=====================================
  Hits        5495    5495           
  Misses      1795    1795           

Files with missing lines	Coverage Δ
kube-client/src/config/file_config.rs	74.5% <ø> (ø)
kube-client/src/config/mod.rs	45.0% <ø> (ø)