Bump undici from 5.22.1 to 5.28.4 in /proxy

Bumps [undici](https://github.com/nodejs/undici) from 5.22.1 to 5.28.4.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.22.1...v5.28.4)

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

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

proxy/yarn.lock

@@ -774,6 +774,11 @@
     "@ethersproject/properties" "^5.7.0"
     "@ethersproject/strings" "^5.7.0"
 
+"@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==
+
 "@ganache/[email protected]":
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/@ganache/ethereum-address/-/ethereum-address-0.1.4.tgz#0e6d66f4a24f64bf687cb3ff7358fb85b9d9005e"
@@ -2361,13 +2366,6 @@ bufferutil@^4.0.1:
   dependencies:
     node-gyp-build "^4.2.0"
 
-busboy@^1.6.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/busboy/-/busboy-1.6.0.tgz#966ea36a9502e43cdb9146962523b92f531f6893"
-  integrity sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==
-  dependencies:
-    streamsearch "^1.1.0"
-
 [email protected]:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
@@ -6381,11 +6379,6 @@ stacktrace-parser@^0.1.10:
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
   integrity sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
 
-streamsearch@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/streamsearch/-/streamsearch-1.1.0.tgz#404dd1e2247ca94af554e841a8ef0eaa238da764"
-  integrity sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==
-
 string-format@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/string-format/-/string-format-2.0.0.tgz#f2df2e7097440d3b65de31b6d40d54c96eaffb9b"
@@ -6853,11 +6846,11 @@ unbox-primitive@^1.0.2:
     which-boxed-primitive "^1.0.2"
 
 undici@^5.14.0:
-  version "5.22.1"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-5.22.1.tgz#877d512effef2ac8be65e695f3586922e1a57d7b"
-  integrity sha512-Ji2IJhFXZY0x/0tVBXeQwgPlLWw13GVzpsWPQ3rV50IFMMof2I55PZZxtm4P6iNq+L5znYN9nSTAq0ZyE6lSJw==
+  version "5.28.4"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-5.28.4.tgz#6b280408edb6a1a604a9b20340f45b422e373068"
+  integrity sha512-72RFADWFqKmUb2hmmvNODKL3p9hcB6Gt2DOQMis1SEBaV6a4MH8soBvzg+95CYhCKPFedut2JY9bMfrDl9D23g==
   dependencies:
-    busboy "^1.6.0"
+    "@fastify/busboy" "^2.0.0"
 
 unfetch@^4.2.0:
   version "4.2.0"