build(deps-dev): bump undici from 6.19.8 to 6.21.2

Bumps [undici](https://github.com/nodejs/undici) from 6.19.8 to 6.21.2.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](https://github.com/nodejs/undici/compare/v6.19.8...v6.21.2)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 6.21.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -5667,9 +5667,9 @@
       "license": "MIT"
     },
     "node_modules/undici": {
-      "version": "6.19.8",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-6.19.8.tgz",
-      "integrity": "sha512-U8uCCl2x9TK3WANvmBavymRzxbfFYG+tAu+fgx3zxQy3qdagQqBLwJVrdyO1TBfUXvfKveMKJZhpvUYoOjM+4g==",
+      "version": "6.21.2",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-6.21.2.tgz",
+      "integrity": "sha512-uROZWze0R0itiAKVPsYhFov9LxrPMHLMEQFszeI2gCN6bnIIZ8twzBCJcN2LJrBBLfrP0t1FW0g+JmKVl8Vk1g==",
       "dev": true,
       "license": "MIT",
       "engines": {