Fix target_os entry for dragonflyBSD in Cargo.toml (#783)

Author: JohnTitor

notify/Cargo.toml

@@ -69,7 +69,7 @@ windows-sys = { workspace = true, features = [
   "Win32_System_IO",
 ] }
 
-[target.'cfg(any(target_os="freebsd", target_os="openbsd", target_os = "netbsd", target_os = "dragonflybsd", target_os = "ios"))'.dependencies]
+[target.'cfg(any(target_os="freebsd", target_os="openbsd", target_os = "netbsd", target_os = "dragonfly", target_os = "ios"))'.dependencies]
 kqueue.workspace = true
 mio.workspace = true