Add "Latest updates" link to patterns reorg (#1536)

After a meeting about #1301, we decided the most appropriate action was
to link out to the existing "Product updates" page.

scripts/patterns-reorg/entries.py

@@ -99,6 +99,7 @@
             ),
         ),
     ),
+    Entry("Latest updates", external_url="/announcements/product-updates"),
 ]
 
 CIRCUIT_CONSTRUCTION = (