chore: fix some typos in comments

[liuyueyangxmu]

High Level Overview of Change

fix some typos in comments

Context of Change

Type of Change

• [x] Documentation update

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)

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 79.1%. Comparing base (1eb0fda) to head (fb51668). :warning: Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6082     +/-   ##
=========================================
- Coverage     79.1%   79.1%   -0.0%     
=========================================
  Files          839     839             
  Lines        71386   71386             
  Branches      8364    8342     -22     
=========================================
- Hits         56452   56440     -12     
- Misses       14934   14946     +12     

Files with missing lines	Coverage Δ
src/xrpld/rpc/detail/TransactionSign.cpp	89.7% <ø> (ø)

... and 3 files with indirect coverage changes

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[liuyueyangxmu]

@vvysokikh1 Thank you for your approval.

If there's anything need I to do, please feel free to let me know.