docs: change node version from 14 to 22 in frontend project

[mahdikhashan]

Description of your changes:
resolves: #11566

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[google-oss-prow]

Hi @mahdikhashan. Thanks for your PR.

I'm waiting for a kubeflow 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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[HumairAK]

/lgtm
/approve

Thank you!

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: HumairAK

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[mprahl]

@HumairAK this CI failure seems related to #11553. Not sure if the format change causes the frontend to have issues as well.