Fix github action for dependabot

[nak3]

This patch fixes the current github action for dependabot.

/cc @kvmware @dprotaso

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nak3

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[nak3]

I verified by https://github.com/nak3/pkg/pull/4

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.09% 🎉

Comparison is base (edf95e6) 81.75% compared to head (0ca1411) 81.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2776      +/-   ##
==========================================
+ Coverage   81.75%   81.85%   +0.09%     
==========================================
  Files         167      167              
  Lines       10201    10201              
==========================================
+ Hits         8340     8350      +10     
+ Misses       1614     1606       -8     
+ Partials      247      245       -2     

see 2 files with indirect coverage changes

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[krsna-m]

/lgtm