website: bump undici from 5.27.2 to 5.28.3 in /website (#8550)

Bumps [undici](https://github.com/nodejs/undici) from 5.27.2 to 5.28.3.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](https://github.com/nodejs/undici/compare/v5.27.2...v5.28.3)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

website/package-lock.json

@@ -16276,9 +16276,9 @@
             }
         },
         "node_modules/undici": {
-            "version": "5.27.2",
+            "version": "5.28.3",
-            "resolved": "https://registry.npmjs.org/undici/-/undici-5.27.2.tgz",
+            "resolved": "https://registry.npmjs.org/undici/-/undici-5.28.3.tgz",
-            "integrity": "sha512-iS857PdOEy/y3wlM3yRp+6SNQQ6xU0mmZcwRSriqk+et/cwWAtwmIGf6WkoDN2EK/AMdCO/dfXzIwi+rFMrjjQ==",
+            "integrity": "sha512-3ItfzbrhDlINjaP0duwnNsKpDQk3acHI3gVJ1z4fmwMK31k5G9OVIAMLSIaP6w4FaGkaAkN6zaQO9LUvZ1t7VA==",
             "dependencies": {
                 "@fastify/busboy": "^2.0.0"
             },