clarify connectivity works for both ios and android (#200)

packages/connectivity/README.md

diff --git a/packages/connectivity/README.md b/packages/connectivity/README.md
index 32a5d3a..78b161f 100644
--- a/packages/connectivity/README.md
+++ b/packages/connectivity/README.md
@@ -1,10 +1,11 @@
 # connectivity
 
 This plugin allows Flutter apps to discover network connectivity and configure
-themselves accordingly. It can distinguish between cellular vs wifi connection.
+themselves accordingly. It can distinguish between cellular vs WiFi connection.
+This plugin works for iOS and Android.
 
 > Note that on Android, this does not guarantee connection to Internet. For instance,
-the app might have wifi access but it might be a VPN or a hotel Wifi with no access.
+the app might have wifi access but it might be a VPN or a hotel WiFi with no access.
 
 Sample usage: