Missing information in util:index-keys#5 detailed description

[daliboris]

Describe the problem
The util:index-keys#5 function description contains Index names table where ngram-index is missing.

Please provide the following

• exist-db version: latest online version dated 2026-01-04
• documentation version: latest online version dated 2026-01-04

[joewiz]

Good eye! If you are thinking of opening a PR, here's the relevant file - in the function-documentation repo: https://github.com/eXist-db/function-documentation/blob/master/src/main/xar-resources/data/docs/util/index-keys_5.md

[daliboris]

Thank you @joewiz , done here.