docs: Fix some comments to improve readability

[box4wangjing]

High Level Overview of Change

fix some comments to improve readability

Context of Change

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[box4wangjing]

@mvadari Thanks. Please review it again.

[mvadari]

Good to go once CI passes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.1%. Comparing base (93ac1aa) to head (3f00fed).

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #7122     +/-   ##
=========================================
- Coverage     82.1%   82.1%   -0.0%     
=========================================
  Files         1010    1010             
  Lines        76167   76167             
  Branches      7423    7412     -11     
=========================================
- Hits         62514   62507      -7     
- Misses       13653   13660      +7     

Files with missing lines	Coverage Δ
include/xrpl/json/Writer.h	93.3% <ø> (ø)
include/xrpl/protocol/detail/ledger_entries.macro	100.0% <ø> (ø)
src/libxrpl/protocol/STAmount.cpp	88.7% <ø> (ø)

... and 5 files with indirect coverage changes

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[mvadari]

@box4wangjing please update your branch and address the CI failures

[box4wangjing]

@box4wangjing please update your branch and address the CI failures

Thanks for your help.
Modified. @mvadari