chore: update Springboot platform version to 3.5.8

[github-actions]

chore: update Springboot platform version to 3.5.8

[knative-prow]

Hi @github-actions[bot]. Thanks for your PR.

I'm waiting for a github.com 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.

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[gauron99]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gauron99, github-actions[bot]

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[gauron99]

/ok-to-test

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.82%. Comparing base (a23f6d8) to head (e74a12d).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3217   +/-   ##
=======================================
  Coverage   51.82%   51.82%           
=======================================
  Files         162      162           
  Lines       19131    19131           
=======================================
+ Hits         9914     9915    +1     
+ Misses       8240     8239    -1     
  Partials      977      977           

Flag	Coverage Δ
integration	17.89% <ø> (-0.02%)	⬇️
unit macos-14	44.37% <ø> (ø)
unit macos-latest	44.37% <ø> (ø)
unit ubuntu-24.04-arm	44.56% <ø> (+0.01%)	⬆️
unit ubuntu-latest	45.31% <ø> (ø)
unit windows-latest	44.39% <ø> (-0.01%)	⬇️

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[lkingland]

/retest