docs: Updated README in app-shell for type change in Connect to Robot…

… via IP address. (#9900)

* Fixed z-index

- added z-index to slideout
- update the `app-shell` README

* Update ConnectRobotSlideout.tsx

* Update ConnectRobotSlideout.tsx

app-shell/README.md

@@ -256,7 +256,7 @@ Email of app user to populate "Email" in support conversations.
 - JSON path: `discovery.candidates`
 - Default: `[]`
 
-`string` or `Array<string>` of extra IP address(es)/hosts for the discovery client to track. For example, to get the discovery client to find an instance of the API server running on your own computer, you could do `--discovery.candidates=localhost`.
+`Array<string>` of extra IP address(es)/hosts for the discovery client to track. For example, to get the discovery client to find an instance of the API server running on your own computer.
 
 ##### labware.directory