chore(dashboard): update TiDB Dashboard to v7.5.5-834dbcaf [release-7.5]

[baurine]

What problem does this PR solve?

Issue Number: close #8913

Update TiDB Dashboard to v7.5.5-834dbcaf.

Release note

None

[ti-chi-bot]

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[ti-chi-bot]

Hi @baurine. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[mornyx]

/retest

[ti-chi-bot]

@mornyx: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[rleungx]

/ok-to-test

[rleungx]

/retest

[mornyx]

/retest

[mornyx]

/retest

[mornyx]

/retest

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.62%. Comparing base (aa647ec) to head (e18b275).

Additional details and impacted files

@@               Coverage Diff               @@
##           release-7.5    #8911      +/-   ##
===============================================
- Coverage        74.63%   74.62%   -0.01%     
===============================================
  Files              447      447              
  Lines            48435    48435              
===============================================
- Hits             36149    36146       -3     
+ Misses            9103     9098       -5     
- Partials          3183     3191       +8     

Flag	Coverage Δ
unittests	74.62% <ø> (-0.01%)	⬇️

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