fix(deps): update dependency @types/node to v18.15.9

Author: renovate[bot]

template/nestjs/function/package.json

@@ -15,7 +15,7 @@
     "typescript": "4.9.5"
   },
   "dependencies": {
-    "@types/node": "18.14.6"
+    "@types/node": "18.15.9"
   },
   "engines": {
     "node": ">=14.16"

template/nestjs/package.json

@@ -13,7 +13,7 @@
   "author": "OpenFaaS Ltd",
   "license": "MIT",
   "dependencies": {
-    "@types/node": "18.14.6",
+    "@types/node": "18.15.9",
     "body-parser": "1.20.2",
     "express": "4.18.2",
     "is-stream": "3.0.0"