fix typo

[fewdan]

What problem does this PR solve?

update document.

What is changed and how does it work?

update document.

Check List

Tests

• No code

Code changes

• NO

Side effects

• NO

Related changes

• NO

Does this PR introduce a user-facing change?:

NONE

[codecov-io]

Codecov Report

Merging #470 into master will increase coverage by 0.26%.
The diff coverage is 53.23%.

@@            Coverage Diff             @@
##           master     #470      +/-   ##
==========================================
+ Coverage   58.57%   58.83%   +0.25%     
==========================================
  Files          60       68       +8     
  Lines        3626     4385     +759     
==========================================
+ Hits         2124     2580     +456     
- Misses       1333     1612     +279     
- Partials      169      193      +24     

Impacted Files	Coverage Δ
api/v1alpha1/common_webhook.go	100.00% <ø> (ø)
api/v1alpha1/iochaos_types.go	31.11% <0.00%> (-1.45%)	⬇️
api/v1alpha1/kernelchaos_types.go	4.44% <0.00%> (-0.21%)	⬇️
api/v1alpha1/networkchaos_types.go	18.65% <0.00%> (-0.29%)	⬇️
api/v1alpha1/podchaos_types.go	31.11% <0.00%> (-1.45%)	⬇️
controllers/stresschaos_controller.go	0.00% <0.00%> (ø)
controllers/timechaos_controller.go	0.00% <0.00%> (ø)
controllers/twophase/types.go	55.78% <0.00%> (-7.31%)	⬇️
pkg/chaosdaemon/netem_linux.go	26.66% <0.00%> (-17.78%)	⬇️
pkg/chaosdaemon/netlink_linux.go	0.00% <ø> (ø)
... and 34 more

---

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[cwen0]

LGTM

[yeya24]

LGTM

[yeya24]

/merge

[sre-bot]

/run-all-tests

[sre-bot]

@fewdan merge failed.

[cwen0]

LGTM

[cwen0]

/merge

[sre-bot]

/run-all-tests