Add clarification for server.ssl.supportedProtocols setting (elastic#…

…22244)

* Add clarification for server.ssl.supportedProtocols setting

Added clarification that the setting has to be an array. With the current wording you can assume that you can just add it as a simple string.

* Update settings.asciidoc

* Update settings.asciidoc

extra dot

docs/setup/settings.asciidoc

@@ -157,7 +157,7 @@ The minimum value is 100.
 
 `server.ssl.redirectHttpFromPort:`:: Kibana will bind to this port and redirect all http requests to https over the port configured as `server.port`.
 
-`server.ssl.supportedProtocols:`:: *Default: TLSv1, TLSv1.1, TLSv1.2*  Supported protocols with versions. Valid protocols: `TLSv1`, `TLSv1.1`, `TLSv1.2`
+`server.ssl.supportedProtocols:`:: *Default: TLSv1, TLSv1.1, TLSv1.2*  An array of supported protocols with versions. Valid protocols: `TLSv1`, `TLSv1.1`, `TLSv1.2`
 
 `status.allowAnonymous:`:: *Default: false* If authentication is enabled, setting this to `true` allows
-unauthenticated users to access the Kibana server status API and status page.
+unauthenticated users to access the Kibana server status API and status page.