docs(kerrors): fix kerrors WithCauseAndExtraMsg method comment

[jjeejj]

What type of PR is this?

fix kerrors WithCauseAndExtraMsg method comment

Which issue(s) this PR fixes:

Fixes #681

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[codecov[bot]]

Codecov Report

Base: 61.81% // Head: 61.90% // Increases project coverage by +0.09% :tada:

Coverage data is based on head (f7dd2db) compared to base (e07cc19). Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #683      +/-   ##
===========================================
+ Coverage    61.81%   61.90%   +0.09%     
===========================================
  Files          214      214              
  Lines        16646    16646              
===========================================
+ Hits         10289    10304      +15     
+ Misses        5368     5360       -8     
+ Partials       989      982       -7     

Impacted Files	Coverage Δ
pkg/kerrors/kerrors.go	90.47% <ø> (ø)
pkg/profiler/profiler.go	70.98% <0.00%> (-1.24%)	:arrow_down:
pkg/remote/trans/nphttp2/grpc/http2_client.go	71.45% <0.00%> (+0.31%)	:arrow_up:
pkg/remote/trans/nphttp2/grpc/http2_server.go	69.87% <0.00%> (+0.48%)	:arrow_up:
pkg/remote/trans/nphttp2/grpc/controlbuf.go	82.56% <0.00%> (+1.32%)	:arrow_up:
pkg/remote/trans/nphttp2/grpc/transport.go	61.72% <0.00%> (+1.91%)	:arrow_up:
pkg/warmup/pool_helper.go	95.83% <0.00%> (+2.08%)	:arrow_up:

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[jjeejj]

已同意