Adding ReactJS PH (#2413)

We have recently formalized a group here in the Philippines with the aim to have monthly meetups, study jams, and eventually(hopefully) a conference. We are on our 5th meetup for the year now! ever since we started the core team 5-6 months ago.

I think the other meetup group is inactive as well as the owner left the group to a company.

content/community/meetups.md

@@ -102,6 +102,7 @@ Do you have a local React.js meetup? Add it here! (Please keep the list alphabet
 
 ## Philippines {#philippines}
 * [Manila](https://www.meetup.com/reactjs-developers-manila/)
+* [Manila - ReactJS PH](https://www.meetup.com/ReactJS-Philippines/)
 
 ## Poland {#poland}
 * [Warsaw](https://www.meetup.com/React-js-Warsaw/)