fix: Update deprecated function to fix failing CI-check

[gauron99]

CI check fails on main https://github.com/knative/func/actions/runs/13407585918/job/37450266323

[codecov]

Codecov Report

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

Project coverage is 65.31%. Comparing base (67d17c2) to head (c9a857b).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/git/github/github.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2701      +/-   ##
==========================================
+ Coverage   64.05%   65.31%   +1.25%     
==========================================
  Files         131      131              
  Lines       15583    15583              
==========================================
+ Hits         9982    10178     +196     
+ Misses       4651     4417     -234     
- Partials      950      988      +38     

Flag	Coverage Δ
e2e-test	35.84% <0.00%> (ø)
e2e-test-oncluster	34.22% <0.00%> (+1.42%)	⬆️
e2e-test-oncluster-runtime	28.55% <0.00%> (?)
e2e-test-runtime-go	26.46% <0.00%> (?)
e2e-test-runtime-node	25.86% <0.00%> (?)
e2e-test-runtime-python	25.86% <0.00%> (?)
e2e-test-runtime-quarkus	26.01% <0.00%> (?)
e2e-test-runtime-rust	24.96% <0.00%> (?)
e2e-test-runtime-springboot	24.98% <0.00%> (?)
e2e-test-runtime-typescript	25.97% <0.00%> (?)
integration-tests	51.95% <0.00%> (+2.27%)	⬆️
unit-tests	50.90% <0.00%> (?)
unit-tests-macos-latest	?
unit-tests-ubuntu-latest	?
unit-tests-windows-latest	?

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[gauron99]

@matejvasek @lkingland PTAL

[gauron99]

@matzew PTAL

[matejvasek]

/approve
/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gauron99, matejvasek

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[matejvasek]

hmm tide says this is in merge pool.