CB-11372 Fix platform guide link on homepage
CB-11372 Fix platform guide link on homepage

tony--/cordova-docs,purplecabbage/cordova-docs,stevengill/cordova-docs,shazron/cordova-docs,purplecabbage/cordova-docs,shazron/cordova-docs,tony--/cordova-docs,purplecabbage/cordova-docs,stevengill/cordova-docs,apache/cordova-docs,apache/cordova-docs,apache/cordova-docs,shazron/cordova-docs,shazron/cordova-docs,purplecabbage/cordova-docs,apache/cordova-docs,stevengill/cordova-docs,stevengill/cordova-docs,tony--/cordova-docs