add change file

Author: philasmar

.autover/changes/388041c1-4920-4e10-994a-a71a83e09f54.json

@@ -0,0 +1,13 @@
+{
+  "Projects": [
+    {
+      "Name": "Amazon.Extensions.Configuration.SystemsManager",
+      "Type": "Major",
+      "ChangelogMessages": [
+        "Updated the .NET SDK dependencies to the latest version 4.0.0-preview.4",
+        "Marked project as trimmable",
+        "Added SourceLink support"
+      ]
+    }
+  ]
+}