Add to v8 14 release notes.

Author: mar-cf

src/content/release-notes/workers.yaml

@@ -6,6 +6,7 @@ entries:
   - publish_date: "2025-08-21"
     description: |-
       - Updated v8 to version 14.0.
+      - Uint8Array type in JavaScript now supports base64 and hex operations.
   - publish_date: "2025-08-14"
     description: |-
       - Enable V8 Sandbox for improved isolation and security.
@@ -330,4 +331,4 @@ entries:
   - publish_date: "2023-01-13"
     description: |-
       - Durable Objects can now use jurisdictions with `idFromName` via a new subnamespace API.
-      - V8 updated to 10.9.
+      - V8 updated to 10.9.