fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-VITE-8648411
- https://snyk.io/vuln/SNYK-JS-UNDICI-8641354

package.json

@@ -10,14 +10,14 @@
     "cypress": "^13.16.1",
     "solid-start-netlify": "^0.3.11",
     "typescript": "^4.9.5",
-    "vite": "^5.3.3"
+    "vite": "^4.5.6"
   },
   "dependencies": {
     "@solidjs/meta": "^0.29.4",
     "@solidjs/router": "^0.15.2",
     "solid-js": "^1.8.18",
     "solid-start": "^0.3.11",
-    "undici": "^6.19.2"
+    "undici": "^5.28.5"
   },
   "engines": {
     "node": ">=16"