build: update README to indicate that source has moved (#852)

ohmayr · web-flow · commit d75692864acb · 2026-03-13T16:15:31.000-07:00
Towards googleapis/google-cloud-python#16054
diff --git a/README.rst b/README.rst
@@ -1,3 +1,8 @@
+:**NOTE**: **This github repository is archived. The repository contents and history have moved to** `google-cloud-python`_.
+
+.. _google-cloud-python: https://github.com/googleapis/google-cloud-python/tree/main/packages/sqlalchemy-spanner
+
+
 Spanner dialect for SQLAlchemy
 ==============================
 
