Added missing semicolon TypeScript example code

Author: ScholliYT

typescript-getting-started/README.md

@@ -34,7 +34,7 @@ exports.helloWorld = functions.https.onRequest((request, response) => {
 
 TypeScript:
 ```js
-import * as functions from 'firebase-functions'
+import * as functions from 'firebase-functions';
 
 export const helloWorld = functions.https.onRequest((request, response) => {
  response.send('Hello from Firebase!\n\n');