fix typo

[jsbxyyx]

What this PR does:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Merging #590 (8d9287e) into master (1a32546) will increase coverage by 0.06%.
The diff coverage is 37.06%.

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@@            Coverage Diff             @@
##           master     #590      +/-   ##
==========================================
+ Coverage   36.88%   36.95%   +0.06%     
==========================================
  Files         162      172      +10     
  Lines       11494    11616     +122     
==========================================
+ Hits         4240     4293      +53     
- Misses       6892     6960      +68     
- Partials      362      363       +1     

Impacted Files	Coverage Δ
pkg/client/client.go	0.00% <0.00%> (ø)
pkg/discovery/config.go	0.00% <0.00%> (ø)
pkg/discovery/consul.go	0.00% <0.00%> (ø)
pkg/discovery/etcd3.go	0.00% <0.00%> (ø)
pkg/discovery/eureka.go	0.00% <0.00%> (ø)
pkg/discovery/nacos.go	0.00% <0.00%> (ø)
pkg/discovery/redis.go	0.00% <0.00%> (ø)
pkg/discovery/sofa.go	0.00% <0.00%> (ø)
pkg/discovery/zk.go	0.00% <0.00%> (ø)
pkg/remoting/getty/rpc_client.go	0.00% <0.00%> (ø)
... and 4 more