Update Kubernetes Dashboard URL to retired GitHub repository

[kevinliao852]

Tracking issue

Why are the changes needed?

The Kubernetes Dashboard project has been retired and moved to the kubernetes-retired

What changes were proposed in this pull request?

How was this patch tested?

Labels

Please add one or more of the following labels to categorize your PR:

• added: For new features.
• changed: For changes in existing functionality.
• deprecated: For soon-to-be-removed features.
• removed: For features being removed.
• fixed: For any bug fixed.
• security: In case of vulnerabilities

This is important to improve the readability of release notes.

Setup process

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Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.96%. Comparing base (d6df4be) to head (4200922).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6882      +/-   ##
==========================================
+ Coverage   56.94%   56.96%   +0.01%     
==========================================
  Files         929      929              
  Lines       58150    58151       +1     
==========================================
+ Hits        33114    33125      +11     
+ Misses      21993    21984       -9     
+ Partials     3043     3042       -1     

Flag	Coverage Δ
unittests-datacatalog	53.51% <ø> (ø)
unittests-flyteadmin	53.14% <ø> (ø)
unittests-flytecopilot	43.06% <ø> (ø)
unittests-flytectl	64.02% <ø> (+0.01%)	⬆️
unittests-flyteidl	75.71% <ø> (ø)
unittests-flyteplugins	60.13% <ø> (ø)
unittests-flytepropeller	53.63% <ø> (+0.06%)	⬆️
unittests-flytestdlib	63.27% <ø> (-0.03%)	⬇️

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