Backport of [docs] fix lack of space character into release/1.13.x

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

Backport

This PR is auto-generated from #26830 to be assessed for backporting due to the inclusion of the label backport/1.13.x.

:rotating_light:

Warning automatic cherry-pick of commits failed. If the first commit failed, you will see a blank no-op commit below. If at least one commit succeeded, you will see the cherry-picked commits up to, not including, the commit where the merge conflict occurred.

The person who merged in the original PR is: @schavis This person should manually cherry-pick the original PR into a new backport PR, and close this one when the manual backport PR is merged in.

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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https://developer.hashicorp.com/vault/docs/concepts/policies#ui-policy-requirements

to the ui/mountsand ui/resultant-acl

needs a space after mounts

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Overview of commits

• 0a54c628ad67d6b99c7349a9a8048f01364b0658

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CI Results: All Go tests succeeded! :white_check_mark:

[stevendpclark]

Closing was fixed within https://github.com/hashicorp/vault/pull/26992