chore: update images ubi8 => ubi9

[matejvasek]

chore: update images ubi8 => ubi9

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matejvasek

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.25%. Comparing base (125e4b6) to head (e7842e2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2328      +/-   ##
==========================================
+ Coverage   60.17%   62.25%   +2.08%     
==========================================
  Files         128      128              
  Lines       14891    11531    -3360     
==========================================
- Hits         8961     7179    -1782     
+ Misses       5008     3421    -1587     
- Partials      922      931       +9     

Flag	Coverage Δ
e2e-test	?
e2e-test-oncluster	31.24% <ø> (-0.01%)	⬇️
e2e-test-oncluster-runtime	27.23% <ø> (?)
integration-tests	51.30% <ø> (+2.43%)	⬆️
unit-tests	49.24% <ø> (?)
unit-tests-macos-latest	?
unit-tests-ubuntu-latest	?
unit-tests-windows-latest	?

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[gauron99]

/lgtm