optimize comment of package-info.java. (#1273)

[jnan806]

Signed-off-by: Jiangnan Jia <jnan0806@gmail.com>

Result:

Fixes #1273

[EvenLjj]

@jnan806 Please execute mvn clean compile to format code before submitting PR.

[jnan806]

get it and has finished.

[codecov[bot]]

Codecov Report

Merging #1276 (8b392de) into master (d53562a) will decrease coverage by 0.08%. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1276      +/-   ##
============================================
- Coverage     72.21%   72.13%   -0.09%     
+ Complexity      782      780       -2     
============================================
  Files           412      412              
  Lines         17467    17467              
  Branches       2723     2723              
============================================
- Hits          12614    12600      -14     
- Misses         3466     3477      +11     
- Partials       1387     1390       +3     

Impacted Files	Coverage Δ
...ipay/sofa/rpc/server/bolt/BoltServerProcessor.java	64.86% <0.00%> (-4.73%)	:arrow_down:
...ansport/bolt/ReuseBoltClientConnectionManager.java	69.56% <0.00%> (-2.90%)	:arrow_down:
...m/alipay/sofa/rpc/codec/jackson/JacksonHelper.java	82.05% <0.00%> (-2.57%)	:arrow_down:
.../alipay/sofa/rpc/metrics/lookout/RpcLookoutId.java	87.30% <0.00%> (-1.59%)	:arrow_down:
...ipay/sofa/rpc/tracer/sofatracer/RpcSofaTracer.java	90.32% <0.00%> (-0.75%)	:arrow_down:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.