DOC-2485: Improve docs for Menu option

[FarzadHayat]

Ticket: DOC-2485

Site: Staging branch

Changes:

• Improve description of menu option to clarify that it does NOT set what menus appear or in what order (it only affect the name of the menu and its menu items).

Pre-checks:

• [x] Branch prefixed with feature/<version>/, hotfix/<version>/, staging/<version>/, or release/<version>/.
• [-] modules/ROOT/nav.adoc has been updated (if applicable).
• [-] Included a release note entry for any New product features.
• [-] If this is a minor release, updated productminorversion in antora.yml and added new supported versions entry in modules/ROOT/partials/misc/supported-versions.adoc.

Review:

• [ ] Documentation Team Lead has reviewed