[docs] Clean up wording of crate root docs

[joshlf]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.04%. Comparing base (b89e4b7) to head (018cc69).

Additional details and impacted files

@@           Coverage Diff           @@
##           v0.8.x    #2076   +/-   ##
=======================================
  Coverage   88.04%   88.04%           
=======================================
  Files          16       16           
  Lines        5983     5983           
=======================================
  Hits         5268     5268           
  Misses        715      715           

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