Update setup.go

Fix typo "packge" -> "package"

cmd/setup.go

@@ -62,7 +62,7 @@ const usage = `== Web Development 40 ==
 
 This tool is designed to enable hot reload for any statically hosted web development.
 It injects a websocket script (in a mirrored version of the file) into html pages
-and uses the fsnotify (cross-platform 'inotify' wrapper) packge to detect filechanges.
+and uses the fsnotify (cross-platform 'inotify' wrapper) package to detect filechanges.
 On filechanges, the websocket will trigger a reload of the page. 
 
 The 40 is only to enable rust-repellant properties.