Bump Contour to v1.28.2

[izabelacg]

Changes

• Bump Contour to v1.28.2

Resolves #1068

[izabelacg]

/hold for others

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.69%. Comparing base (820cd7c) to head (8480309).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1072      +/-   ##
==========================================
- Coverage   94.06%   93.69%   -0.37%     
==========================================
  Files          11       11              
  Lines         893      682     -211     
==========================================
- Hits          840      639     -201     
+ Misses         32       22      -10     
  Partials       21       21              

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[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, izabelacg

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[dprotaso]

/hold cancel

[dprotaso]

Error from server (InternalError): error when retrieving current configuration of:
Resource: "/v1, Resource=namespaces", GroupVersionKind: "/v1, Kind=Namespace"
Name: "contour-external", Namespace: ""
from server for: "STDIN": an error on the server ("Internal Server Error: "/api/v1/namespaces/contour-external": the server is currently unable to handle the request") has prevented the request from succeeding (get namespaces contour-external)

ugh GKE

/retest