Follow-up from "Support minimum language server client restriction"

The following discussion from !193642 (merged) should be addressed:

• @erran started a discussion:

  Slight improvement for the admin area instructions:

  By default, any GitLab Language Server version can connect to your GitLab instance. You
  can configure a minimum language server version and block requests from clients on older
  versions. Existing clients will receive an API error with the message `Language server
  client error: Requests from Editor Extension clients are restricted)`.

  In a separate docs only merge request I can update troubleshooting steps for each editor extension and the language server in general to include these details.

• @erran added !193642 (comment 2551843169)