Add changelog entry

Author: bbasata

.changes/unreleased/NOTES-20250414-095537.yaml

@@ -0,0 +1,5 @@
+kind: NOTES
+body: 'This alpha pre-release adds support for managed resource identity, which can be used with Terraform v1.12.0-beta1. Acceptance tests can use the `ImportBlockWithResourceIdentity` kind to exercise the import of a managed resource using its resource identity object values instead of using a string identifier.'
+time: 2025-04-14T09:55:37.938453-04:00
+custom:
+    Issue: "480"