chore(templates): update templates with next.js promises (#8547)

Updates templates according to this PR
https://github.com/payloadcms/payload/pull/8489

templates/vercel-postgres/package.json

@@ -18,10 +18,10 @@
     "@payloadcms/storage-vercel-blob": "beta",
     "@vercel/blob": "^0.22.3",
     "cross-env": "^7.0.3",
-    "next": "15.0.0-canary.53",
+    "next": "15.0.0-canary.173",
     "payload": "beta",
-    "react": "19.0.0-rc-6230622a1a-20240610",
-    "react-dom": "19.0.0-rc-6230622a1a-20240610",
+    "react": "19.0.0-rc-3edc000d-20240926",
+    "react-dom": "19.0.0-rc-3edc000d-20240926",
     "sharp": "0.32.6"
   },
   "devDependencies": {
@@ -30,7 +30,7 @@
     "@types/react-dom": "npm:types-react-dom@19.0.0-rc.1",
     "autoprefixer": "^10.0.1",
     "eslint": "^8",
-    "eslint-config-next": "15.0.0-canary.53",
+    "eslint-config-next": "15.0.0-canary.173",
     "postcss": "^8",
     "tailwindcss": "^3.3.0",
     "typescript": "5.6.2"

templates/vercel-postgres/src/app/(payload)/admin/[[...segments]]/page.tsx

@@ -6,12 +6,12 @@ import config from '@payload-config'
 import { RootPage, generatePageMetadata } from '@payloadcms/next/views'
 
 type Args = {
-  params: {
+  params: Promise<{
     segments: string[]
-  }
-  searchParams: {
+  }>
+  searchParams: Promise<{
     [key: string]: string | string[]
-  }
+  }>
 }
 
 export const generateMetadata = ({ params, searchParams }: Args): Promise<Metadata> =>