fix(observatory): update FAQ question about move (#11413)

copy/observatory/faq.md

@@ -57,10 +57,10 @@ there is now no reason to provide the "public" flag.
 
 ## When did the move occur?
 
-HTTP Observatory was launched on MDN on July 2, 2024, with the existing Mozilla
-Observatory site redirecting to it. Other tools like TLS Observatory, SSH
-Observatory, and Third-party tests have been deprecated, and will be sunset in
-September 2024.
+The new HTTP Observatory was launched on MDN on July 2, 2024. The
+[old Mozilla Observatory](https://observatory.mozilla.org/) — containing HTTP
+Observatory plus other tools like TLS Observatory, SSH Observatory, and
+Third-party tests — has been deprecated and will be sunset in September 2024.
 
 > **Note:** Historic scan data has been preserved, and is included in the
 > provided scan history for each domain.