Bump undici from 6.20.1 to 6.21.1 in /web-ui

Bumps [undici](https://github.com/nodejs/undici) from 6.20.1 to 6.21.1.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.20.1...v6.21.1)

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

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

Author: dependabot[bot]

web-ui/yarn.lock

@@ -8169,9 +8169,9 @@ unbox-primitive@^1.0.2:
     which-boxed-primitive "^1.0.2"
 
 undici@^6.19.5:
-  version "6.20.1"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-6.20.1.tgz#fbb87b1e2b69d963ff2d5410a40ffb4c9e81b621"
-  integrity sha512-AjQF1QsmqfJys+LXfGTNum+qw4S88CojRInG/6t31W/1fk6G59s92bnAvGz5Cmur+kQv2SURXEvvudLmbrE8QA==
+  version "6.21.1"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-6.21.1.tgz#336025a14162e6837e44ad7b819b35b6c6af0e05"
+  integrity sha512-q/1rj5D0/zayJB2FraXdaWxbhWiNKDvu8naDT2dl1yTlvJp4BLtOcp2a5BvgGNQpYYJzau7tf1WgKv3b+7mqpQ==
 
 unicorn-magic@^0.1.0:
   version "0.1.0"