Backport of Update index.mdx into release/1.11.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #17052 to be assessed for backporting due to the inclusion of the label backport/1.11.x.

WARNING automatic cherry-pick of commits failed. Commits will require human attention.

merge conflict error: POST https://api.github.com/repos/hashicorp/vault/merges: 409 Merge conflict []

The below text is copied from the body of the original PR.

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Fixes a link reported in SEO audit

https://app.asana.com/0/0/1202888076877385/f

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Overview of commits

• ee80646e7e82c1e33fa67cd97194057f3166f292

[hashicorp-cla]

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[schavis]

Closing failed auto-backport PR that is more than 1 month old