build(deps): Bump undici in /website in the npm_and_yarn group

Bumps the npm_and_yarn group in /website with 1 update: [undici](https://github.com/nodejs/undici).


Updates `undici` from 6.21.0 to 6.21.1
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.21.0...v6.21.1)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <[email protected]>

website/yarn.lock

@@ -10486,9 +10486,9 @@ undici-types@~6.19.8:
   integrity sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==
 
 undici@^6.19.5:
-  version "6.21.0"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-6.21.0.tgz#4b3d3afaef984e07b48e7620c34ed8a285ed4cd4"
-  integrity sha512-BUgJXc752Kou3oOIuU1i+yZZypyZRqNPW0vqoMPl8VaoalSfeR0D8/t4iAS3yirs79SSMTxTag+ZC86uswv+Cw==
+  version "6.21.1"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-6.21.1.tgz#336025a14162e6837e44ad7b819b35b6c6af0e05"
+  integrity sha512-q/1rj5D0/zayJB2FraXdaWxbhWiNKDvu8naDT2dl1yTlvJp4BLtOcp2a5BvgGNQpYYJzau7tf1WgKv3b+7mqpQ==
 
 unicode-canonical-property-names-ecmascript@^2.0.0:
   version "2.0.1"