docs(readme): fix validator page link

[anilcse]

Description

Closes: #XXXX

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Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow-up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

[github-actions]

Marked as stale; will be closed in five days.

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