Rename client::error::SendRequestError to ClientError

[fafhrd91]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 39.75904% with 50 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.52%. Comparing base (776ee84) to head (fb2e6ac).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
ntex/src/client/error.rs	0.00%	46 Missing ⚠️
ntex/src/client/h2proto.rs	71.42%	2 Missing ⚠️
ntex/src/client/h1proto.rs	75.00%	1 Missing ⚠️
ntex/src/client/response.rs	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #814      +/-   ##
==========================================
- Coverage   90.62%   90.52%   -0.11%     
==========================================
  Files         239      239              
  Lines       33583    33608      +25     
==========================================
- Hits        30433    30422      -11     
- Misses       3150     3186      +36     

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