fix deploy script in readme

Author: Josefie Zynga

README.md

@@ -17,7 +17,7 @@ The most imporant ones are:
 - `npm install` - Installs all dependencies.
 - `npm start` - Runs the app in the development mode. Open http://localhost:3000 to view it in the browser.
 - `npm run build` - Builds the app for production to the build folder.
-- `npm deploy` - Pushes all changes to the gh-pages branch and deploys the update to http://josefie.github.io/set.
+- `npm run deploy` - Pushes all changes to the gh-pages branch and deploys the update to http://josefie.github.io/set.
 
 ## Directory structure