Correcting branch name in resources.json

remoteResources/resources.json

@@ -11,7 +11,7 @@
 	},
 	"SlicerLabkeyExtension":{
 		"url":"http://wiscigt.powertheword.com/labkey/SlicerLabkeyExtension/-/archive/SlicerExtensionIndex/SlicerLabkeyExtension-SlicerExtensionIndex.zip",
-		"branch":"SlicerExtenstionIndex",
+		"branch":"SlicerExtensionIndex",
 		"modules":["labkeyBrowser"]
 	}
 }