Update INSTALLATION.md (#1745)
Update INSTALLATION.md (#1745)

fixed typo
jaraxasoftware/phonegap-plugin-push,shazron/phonegap-plugin-push,shazron/phonegap-plugin-push,intercom/phonegap-plugin-push,phonegap/phonegap-plugin-push,shazron/phonegap-plugin-push,intercom/phonegap-plugin-push,phonegap/phonegap-plugin-push,intercom/phonegap-plugin-push,phonegap/phonegap-plugin-push,jaraxasoftware/phonegap-plugin-push,jaraxasoftware/phonegap-plugin-push