Add D1 to account-owned-tokens.mdx (#21613)

cc @vy-ton

Author: elithrar

src/content/partials/fundamentals/account-owned-tokens.mdx

@@ -36,6 +36,7 @@ Account owned tokens are generally available for all accounts. Some services may
 | Configuration Rules             | ✅            |
 | Custom Lists                    | ❌            |
 | Custom Pages                    | ✅            |
+| D1                              | ✅            |
 | Data Loss Prevention            | ✅            |
 | Digital Experience Monitoring   | ✅            |
 | Distributed Web                 | ✅            |