chore: fix some comments

[pengbanban]

fix some comments

[yihuang]

thanks, can you sign the commit?

[pengbanban]

thanks, can you sign the commit?

Of course. Signed.

Sorry for waiting so long.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 36.55%. Comparing base (f26b2cc) to head (5fc7c4e).
Report is 1 commits behind head on master.

Files	Patch %	Lines
app/app.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1074      +/-   ##
==========================================
+ Coverage   34.34%   36.55%   +2.20%     
==========================================
  Files          93      101       +8     
  Lines       14105    14350     +245     
==========================================
+ Hits         4844     5245     +401     
+ Misses       8319     8158     -161     
- Partials      942      947       +5     

Flag	Coverage Δ
integration_tests	25.79% <0.00%> (ø)
integration_tests_byzantine	11.27% <0.00%> (ø)
integration_tests_gov	11.54% <0.00%> (ø)
integration_tests_grpc	11.54% <0.00%> (ø)
integration_tests_ibc	27.52% <0.00%> (ø)
integration_tests_ledger	11.53% <0.00%> (ø)
integration_tests_slow	11.53% <0.00%> (ø)
integration_tests_solomachine	11.32% <0.00%> (ø)
integration_tests_upgrade	?
unit_tests	11.86% <0.00%> (?)

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