message: docs(collaboration): clarify compatibility for joining shared ws
diff: @@ -66,6 +66,8 @@ To share your workspace, navigate to the workspaces page at https://gitpod.io/wo
  This marks your workspace as shared. When you open it, you can copy & share its URL.
  +> **Note:** You can join shared workspaces only by using VS Code Browser. If you prefer to use another editor, please consider using [external collaboration plugins](#external-collaboration-plugins).
  +
  > **Security note:**
  >
  > Beware, anybody with this URL and a Gitpod account will be able to access the workspace as long as
  