fs/ntfs3: Document the hidedotfiles mount option

Add documentation for the hidedotfiles mount option.
Signed-off-by: NDaniel Pinto <danielpinto52@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>

Documentation/filesystems/ntfs3.rst

@@ -75,6 +75,12 @@ this table marked with no it means default is without **no**.
      - Files with the Windows-specific SYSTEM (FILE_ATTRIBUTE_SYSTEM) attribute
        will be marked as system immutable files.
 
+   * - hidedotfiles
+     - Updates the Windows-specific HIDDEN (FILE_ATTRIBUTE_HIDDEN) attribute
+       when creating and moving or renaming files. Files whose names start
+       with a dot will have the HIDDEN attribute set and files whose names
+       do not start with a dot will have it unset.
+
    * - windows_names
      - Prevents the creation of files and directories with a name not allowed
        by Windows, either because it contains some not allowed character (which