Shared channels to connected workspaces (#7610)

* Removed scale on web/desktop screenshots

* Rebranded Shared Channels as Connected Workspaces

source/about/mattermost-v10-changelog.md

@@ -32,9 +32,9 @@ If you upgrade from a release earlier than v10.0, please read the other [Importa
 
 #### Administration
  - Added a new URL parameter called ``permanent`` to ``DELETE /api/v4/posts/<post-id>``, and set ``permanent`` to ``true`` in order to permanently delete a post and its attachments.
- - Added Shared Channels administration page to the System Console.
- - Added a team selector to accept connection invite flow in Shared Workspaces.
- - Restricted activation and deactivation of LDAP-managed users through both the System Admin Console UI and Mattermost API.
+ - Added Connected Workspaces (Beta) administration page to the System Console when Connected Workspaces are [enabled](https://docs.mattermost.com/onboard/connected-workspaces.html#enable-connected-workflows) for the server.
+ - Added a team selector to accept connection invite flow in Connected Workspaces.
+ - Restricted activation and deactivation of LDAP-managed users through both the System Console UI and Mattermost API.
  - Export/import improvements: added the ability to export all user preferences and flagged posts.
  - Increased timeouts to fetch cluster logs.
  - Improved log messages for cluster communication.