Update schema-event.js

Author: heiskr

lib/schema-event.js

@@ -83,7 +83,7 @@ const context = {
     browser: {
       type: 'string',
       description: 'The type of browser the user is browsing with.',
-      enum: ['chrome', 'safari', 'firefox', 'edge', 'ie', 'other'],
+      enum: ['chrome', 'safari', 'firefox', 'edge', 'ie', 'cros', 'other'],
       default: 'other'
     },
     browser_version: {