[wip] make use of new go1.24 so we don't need x/net/h2c package

[dprotaso]

• drop use of old h2c package
• run ./hack/update-dep.sh

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso

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[codecov]

Codecov Report

❌ Patch coverage is 23.33333% with 46 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.43%. Comparing base (e853b1d) to head (b24adc6).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
network/transports.go	28.00%	36 Missing ⚠️
network/server.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3298      +/-   ##
==========================================
- Coverage   74.58%   74.43%   -0.15%     
==========================================
  Files         188      188              
  Lines        8187     8211      +24     
==========================================
+ Hits         6106     6112       +6     
- Misses       1841     1860      +19     
+ Partials      240      239       -1     

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[knative-prow-robot]

PR needs rebase.

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