docs: fixed multiple typos, updated latest en.json strings (#371) [skip ci]

src/components/Login/index.tsx

@@ -20,7 +20,7 @@ const Login: React.FC = () => {
 
   // Effect that is triggered when the `authToken` comes back from the Plex OAuth
   // We take the token and attempt to login. If we get a success message, we will
-  // ask swr to revalidate the user which _shouid_ come back with a valid user.
+  // ask swr to revalidate the user which _should_ come back with a valid user.
   useEffect(() => {
     const login = async () => {
       setProcessing(true);