chore: fix some typos in comments

[racequite]

No description provided.

[shu-mutou]

/label kind/cleanup

[k8s-ci-robot]

@shu-mutou: The label(s) /label kind/cleanup cannot be applied. These labels are supported: api-review, tide/merge-method-merge, tide/merge-method-rebase, tide/merge-method-squash, team/katacoda, refactor. Is this label configured under labels -> additional_labels or labels -> restricted_labels in plugin.yaml?

In response to this:

/label kind/cleanup

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[codecov]

Codecov Report

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

Project coverage is 37.20%. Comparing base (dde23c4) to head (5cdd11a).
Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #8943   +/-   ##
=======================================
  Coverage   37.19%   37.20%           
=======================================
  Files         255      255           
  Lines       11156    11156           
  Branches      157      158    +1     
=======================================
+ Hits         4150     4151    +1     
- Misses       6756     6793   +37     
+ Partials      250      212   -38     

[shu-mutou]

/lgtm

[k8s-ci-robot]

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This pull-request has been approved by: racequite, shu-mutou

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