Bump undici from 5.22.1 to 5.29.0 in /fixtures/flight-esm

Bumps [undici](https://github.com/nodejs/undici) from 5.22.1 to 5.29.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.22.1...v5.29.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 5.29.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

fixtures/flight-esm/package.json

@@ -13,7 +13,7 @@
     "prompts": "^2.4.2",
     "react": "experimental",
     "react-dom": "experimental",
-    "undici": "^5.20.0",
+    "undici": "^5.29.0",
     "webpack-sources": "^3.2.0"
   },
   "scripts": {

fixtures/flight-esm/yarn.lock

@@ -9,6 +9,11 @@
   dependencies:
     regenerator-runtime "^0.13.11"
 
+"@fastify/busboy@^2.0.0":
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/@fastify/busboy/-/busboy-2.1.1.tgz#b9da6a878a371829a0502c9b6c1c143ef6663f4d"
+  integrity sha512-vBZP4NlzfOlerQTnba4aqZoMhE/a9HY7HRqoOPaETQcSQuWEIyZMHGfVu6w9wGtGK5fED5qRs2DteVCjOH60sA==
+
 abbrev@1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
@@ -730,12 +735,12 @@ undefsafe@^2.0.5:
   resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.5.tgz#38733b9327bdcd226db889fb723a6efd162e6e2c"
   integrity sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==
 
-undici@^5.20.0:
-  version "5.22.1"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-5.22.1.tgz#877d512effef2ac8be65e695f3586922e1a57d7b"
-  integrity sha512-Ji2IJhFXZY0x/0tVBXeQwgPlLWw13GVzpsWPQ3rV50IFMMof2I55PZZxtm4P6iNq+L5znYN9nSTAq0ZyE6lSJw==
+undici@^5.29.0:
+  version "5.29.0"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-5.29.0.tgz#419595449ae3f2cdcba3580a2e8903399bd1f5a3"
+  integrity sha512-raqeBD6NQK4SkWhQzeYKd1KmIG6dllBOTt55Rmkt4HtI9mwdWtJljnrXjAFUBLTSN67HWrOIZ3EPF4kjUw80Bg==
   dependencies:
-    busboy "^1.6.0"
+    "@fastify/busboy" "^2.0.0"
 
 unpipe@1.0.0:
   version "1.0.0"