docs: corrected the order of developing platforms

Author: ethanneff

DEVELOPING.md

@@ -74,13 +74,13 @@ cordova platform remove ios;
 cordova platform remove android;
 cordova platform remove browser;
 
+cordova platform add ios;
+cordova platform add android;
+
 cordova plugin remove io.branch.sdk;
 cordova plugin add ../ --variable BRANCH_KEY=key_live_icCccJIpd7GlYY5oOmoEtpafuDiuyXhT --variable URI_SCHEME=enefftest;
 # cordova plugin add branch-cordova-sdk --variable BRANCH_KEY=key_live_icCccJIpd7GlYY5oOmoEtpafuDiuyXhT --variable URI_SCHEME=enefftest;
 
-cordova platform add ios;
-cordova platform add android;
-
 cordova build ios;
 cordova build android;
 ```