Update folder-caseSensitiveFS.rst

Add Android to list of systems that are case-insensitive.

Author: camoz

advanced/folder-caseSensitiveFS.rst

@@ -11,8 +11,8 @@ handling.
 With ``caseSensitiveFS`` set to  ``false`` (the default setting)
 Syncthing's case sensitivity safety checks are enabled. 
 Syncthing will then attempt to detect and prevent case-only file
-name collisions that can occur on case insensitive systems such as Windows
-and macOS, or other systems with case insensitive file systems.
+name collisions that can occur on case insensitive systems such as Windows,
+macOS, and Android.
 
 When set to ``true`` the extra safety checks for case insensitive
 filesystems are disabled. This will provide a small improvement in