quickstarts/time-server: Fix typo in README

Author: gkalpak

quickstarts/time-server/README.md

@@ -56,7 +56,7 @@ Deploy to Firebase using the following command:
 firebase deploy
 ```
 
-This deploys and activate the date Function.
+This deploys and activates the date Function.
 
 > The first time you call `firebase deploy` on a new project with Functions will take longer than usual.