examples/linux-inotify.rs: Fix usage of function deprecated in inotif…

…y 0.10.1

examples/linux-inotify.rs

@@ -37,7 +37,7 @@ fn main() -> std::io::Result<()> {
     future::block_on(async {
         // Watch events in the current directory.
         let mut inotify = Async::new(Inotify::init()?)?;
-        inotify.get_mut().add_watch(".", WatchMask::ALL_EVENTS)?;
+        inotify.get_mut().watches().add(".", WatchMask::ALL_EVENTS)?;
         println!("Watching for filesystem events in the current directory...");
         println!("Try opening a file to trigger some events.");
         println!();