Fix typo in winfsp_wrs/src/file_system.rs

winfsp_wrs/src/file_system.rs

@@ -359,7 +359,7 @@ impl<Ctx: FileSystemContext> FileSystem<Ctx> {
             let res = FspFileSystemCreate(
                 // `device_name` contains const data, so this `cast_mut` is a bit scary !
                 // However, it is only a limitation in the type system (we need to cast
-                // to `PWSTR`): in practice this parameter in never modified.
+                // to `PWSTR`): in practice this parameter is never modified.
                 device_name.as_ptr().cast_mut(),
                 &params.volume_params.0,
                 interface,