Fix path to moved helpers file

Author: kzu

.netconfig

@@ -135,7 +135,7 @@
 
 	etag = da7c0104131bd474b52fc9bc9f9bda6470e24ae38d4fb9f5c4f719bc01370ab5
 	weak
-[file "src/AI.Tests/Attributes.cs"]
+[file "src/AI.Tests/Extensions/Attributes.cs"]
 	url = https://github.com/devlooped/catbag/blob/main/Xunit/Attributes.cs
 	sha = 615c1e2521340dcd85132807b368a52ff53e4ba7