fix(cli): wrong variable to store --no-proxy value (cherry-pick #21226)

[gcp-cherry-pick-bot]

Cherry-picked fix(cli): wrong variable to store --no-proxy value (#21226)

Signed-off-by: Nathanael Liechti [email protected]

[codecov]

Codecov Report

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

Project coverage is 55.06%. Comparing base (bb70a1f) to head (f45c49b).

Files with missing lines	Patch %	Lines
cmd/util/repo.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-2.13   #22591      +/-   ##
================================================
- Coverage         55.09%   55.06%   -0.03%     
================================================
  Files               320      320              
  Lines             54856    54856              
================================================
- Hits              30221    30209      -12     
- Misses            22041    22056      +15     
+ Partials           2594     2591       -3     

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