CodeArtifact Update: Add support for the NuGet package format.

Author: AWS

.changes/next-release/feature-CodeArtifact-b99b7cd.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "CodeArtifact",
+    "contributor": "",
+    "description": "Add support for the NuGet package format."
+}