Update info on cloud sync availability

It's not Apple-only anymore.

Author: pstef

docs/guides/retroarch-cloud-sync.md

@@ -1,6 +1,6 @@
 # What is it?
 
-RetroArch Cloud Sync is available in recent RetroArch Nighties and enables a seamless synchronization of the most important system configuration and save data to a dedicated private webdav server, from where these data can be synchronized across Apple devices. The current functionality is limited to Apple devices (MacOS, iOS, tvOS) because it was developed here. It can be deployed to other RetroArch operating systems, if a developer is interested in this work.
+RetroArch Cloud Sync enables a seamless synchronization of the most important system configuration and save data to a dedicated private webdav server, from where these data can be synchronized across your devices.
 
 RetroArch Cloud Sync currently syncs all data from the following directories:
 
@@ -66,4 +66,4 @@ find . -name '.DS_Store' -type f -delete
 
 ### Troubleshooting
 
-If the Cloud Sync returns an error, turn logging on and set the logging level to debug, log into a file. Cloud Sync logs reliably into the logfile, so the errors can be read easily. Not all conflicts that RetroArch Cloud Sync returns are critical (e.g. cache conflicts that can be easily resolved by deleting the conflicting local cache file according to the logfile). Other conflicts may even be desired, e.g. if core configurations shall differ between the MacOS core and the iOS core.
+If the Cloud Sync returns an error, turn logging on and set the logging level to debug, log into a file. Cloud Sync logs reliably into the logfile, so the errors can be read easily. Not all conflicts that RetroArch Cloud Sync returns are critical (e.g. cache conflicts that can be easily resolved by deleting the conflicting local cache file according to the logfile). Other conflicts may even be desired, e.g. if core configurations shall differ between the MacOS core and the iOS core.