build(deps): bump undici from 6.21.1 to 6.21.3 (#5373)

Bumps [undici](https://github.com/nodejs/undici) from 6.21.1 to 6.21.3.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.21.1...v6.21.3)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 6.21.3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Will Harney <62956339+wjhsf@users.noreply.github.com>

Author: dependabot[bot]

yarn.lock

@@ -1923,11 +1923,9 @@
 
 "@lwc/eslint-plugin-lwc-internal@link:./scripts/eslint-plugin":
   version "0.0.0"
-  uid ""
 
 "@lwc/test-utils-lwc-internals@link:./scripts/test-utils":
   version "0.0.0"
-  uid ""
 
 "@napi-rs/wasm-runtime@0.2.4":
   version "0.2.4"
@@ -12187,9 +12185,9 @@ undici-types@~6.21.0:
   integrity sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==
 
 undici@^6.19.5, undici@^6.20.1:
-  version "6.21.1"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-6.21.1.tgz#336025a14162e6837e44ad7b819b35b6c6af0e05"
-  integrity sha512-q/1rj5D0/zayJB2FraXdaWxbhWiNKDvu8naDT2dl1yTlvJp4BLtOcp2a5BvgGNQpYYJzau7tf1WgKv3b+7mqpQ==
+  version "6.21.3"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-6.21.3.tgz#185752ad92c3d0efe7a7d1f6854a50f83b552d7a"
+  integrity sha512-gBLkYIlEnSp8pFbT64yFgGE6UIB9tAkhukC23PmMDCe5Nd+cRqKxSjw5y54MK2AZMgZfJWMaNE4nYUHgi1XEOw==
 
 unicode-canonical-property-names-ecmascript@^2.0.0:
   version "2.0.1"