updated test for animation not in keyed each

test/validator/samples/animation-not-in-keyed-each/errors.json

@@ -1,6 +1,6 @@
 [{
 	"code": "invalid-animation",
-	"message": "An element that uses the animate directive must be the immediate child of a keyed each block",
+	"message": "An element that uses the animate directive must be used inside a keyed each block. Did you forget to add a key to your each block?",
 	"start": {
 		"line": 6,
 		"column": 6,