Bring back deprecation note

Author: vcarvajal-sigsci

documentation/docs/dictionary/Dictionary/Dictionary.mdx

@@ -8,6 +8,12 @@ import {Fiddle} from '@site/src/components/fiddle';
 
 # `Dictionary()`
 
+:::info
+
+This Class is deprecated
+
+:::
+
 The **`Dictionary` constructor** lets you access a specific [Fastly Edge Dictionary](https://docs.fastly.com/en/guides/about-edge-dictionaries).
 
 **Note**: Can only be used when processing requests, not during build-time initialization.