Update to symbiote name for silverstripe-gridfieldextensions composer.json

composer.json

@@ -7,7 +7,7 @@
 	"require": {
 		"silverstripe/framework": "~3.1",
 		"silverstripe/cms": "~3.1",
-		"silverstripe-australia/gridfieldextensions": "~1.1",
+		"symbiote/silverstripe-gridfieldextensions": "~1.1",
 		"silverstripe/segment-field": "^1.0",
         "silverstripe/userforms": "dev-master#e34b87f760529f0e447a5b3c27118622b6ec7198 as 3.1.0",
         "stevie-mayhew/trait-loader": "^1.0"