Add per-record CNAME flattening to DNS changelog

Author: RebeccaTamachiro

src/content/changelogs/dns.yaml

@@ -8,6 +8,9 @@ entries:
   - publish_date: "2024-10-15"
     title: Quote validation for TXT records added via dashboard
     description: |-
-      When creating TXT records via the dashboard users will now find:
+      When creating [TXT records](/dns/manage-dns-records/reference/dns-record-types/#txt) via the dashboard you will now find:
       - Field validation errors if double quotes `"` are added inconsistently.
-      - Automatically quoted TXT content upon save if no quotes exist in the record content field.
+      - Automatically quoted TXT content upon save if no quotes exist in the record content field.
+  - publish_date: "2024-10-07"
+    title: API support for per-record CNAME flattening
+    description: Paid zones now have the option to flatten specific CNAME records. When using the API, specify the setting `cname_flatten` as `true`or `false`. Refer to the [documentation](/dns/cname-flattening/set-up-cname-flattening/#per-record) for details.