Update open.mdx

Author: robin-norwood

website/docs/plugin/framework/ephemeral-resources/open.mdx

@@ -1,7 +1,7 @@
 ---
 page_title: Opening ephemeral resources
 description: >-
-  Learn how to open ephemeral resource in the Terraform provider framework.
+  Learn how to open ephemeral resource in the Terraform plugin framework.
 ---
 
 # Opening ephemeral resources