Fix typo.

[wayilau]

What is the purpose of the change

Fix typo. build used following can, not built.

[codecov-io]

Codecov Report

Merging #4739 into master will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4739      +/-   ##
============================================
- Coverage     63.98%   63.92%   -0.07%     
+ Complexity      452      451       -1     
============================================
  Files           769      769              
  Lines         33178    33178              
  Branches       5229     5229              
============================================
- Hits          21229    21209      -20     
- Misses         9525     9548      +23     
+ Partials       2424     2421       -3

Impacted Files	Coverage Δ	Complexity Δ
.../apache/dubbo/qos/protocol/QosProtocolWrapper.java	65.85% <0%> (-17.08%)	0% <0%> (ø)
...e/dubbo/remoting/transport/netty/NettyChannel.java	57.64% <0%> (-4.71%)	20% <0%> (-1%)
.../rpc/protocol/dubbo/LazyConnectExchangeClient.java	56.47% <0%> (-2.36%)	0% <0%> (ø)
...he/dubbo/registry/multicast/MulticastRegistry.java	67.87% <0%> (-1.81%)	0% <0%> (ø)
...pache/dubbo/registry/support/AbstractRegistry.java	78.54% <0%> (-1.54%)	0% <0%> (ø)
.../java/org/apache/dubbo/config/ReferenceConfig.java	60.58% <0%> (-0.37%)	0% <0%> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	63.04% <0%> (+4.34%)	0% <0%> (ø)	⬇️

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[kezhenxu94]

LGTM