add change file for 3.0.0-preview.2

Author: philasmar

.autover/changes/31934f1f-d986-4d98-8f0f-e3008f43c7ff.json

@@ -0,0 +1,11 @@
+{
+  "Projects": [
+    {
+      "Name": "Amazon.Extensions.S3.Encryption",
+      "Type": "Patch",
+      "ChangelogMessages": [
+        "Create traces using the SDK observability APIs for the S3 Encryption Encryption and Decryption pipeline handlers."
+      ]
+    }
+  ]
+}