Typo fix: muthual autentication -> mutual authentication

[mirake]

No description provided.

[codecov-io]

Codecov Report

Merging #2590 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2590   +/-   ##
=======================================
  Coverage   40.54%   40.54%           
=======================================
  Files          75       75           
  Lines        5105     5105           
=======================================
  Hits         2070     2070           
  Misses       2754     2754           
  Partials      281      281

Impacted Files	Coverage Δ
internal/ingress/annotations/authtls/main.go	0% <ø> (ø)	⬆️

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[aledbf]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, mirake

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[aledbf]

@mirake thanks!