bump undici to 5.28.5

Signed-off-by: Brian DeHamer <bdehamer@github.com>

package.json

@@ -39,7 +39,7 @@
     "@sigstore/rekor-types": "^3.0.0",
     "@types/jsonwebtoken": "^9.0.6",
     "nock": "^13.5.1",
-    "undici": "^5.28.4"
+    "undici": "^5.28.5"
   },
   "dependencies": {
     "@actions/core": "^1.11.1",