๊Update FCM example

Author: mobizt

examples/Messaging/WebClient/fcm.html

@@ -59,10 +59,10 @@
 
             1. Place the <span id="url1"></span> files in the root directory of your web server.<br /><br />
 
-            When you host the FCM web app on a remote server, the app should be access through the HTTPS protocol
+            When you host the FCM web app on a remote server, the app should be accessed through the HTTPS protocol
             (https://) because FCM SDK is only support it.<br /><br />
 
-            When you host the FCM web app on your local host, the app should be access through
+            When you host the FCM web app on your local host, the app should be accessed through
             http://localhost.<br /><br />
 
             2. Under the <b>Initialization</b> page, specify the information from <a