fix: use placeholder publish URL (runtime resolver overrides it)

The actual update URL is resolved dynamically via Forgejo API
in _resolveUpdateUrl() before each update check.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dev-app-update.yml

@@ -1,2 +1,2 @@
 provider: generic
-url: https://git.sanhost.net/sanasol/hytale-f2p/releases/latest/download
+url: https://git.sanhost.net/sanasol/hytale-f2p/releases/download/latest

package.json

@@ -119,7 +119,7 @@
     },
     "publish": {
       "provider": "generic",
-      "url": "https://git.sanhost.net/sanasol/hytale-f2p/releases/latest/download"
+      "url": "https://git.sanhost.net/sanasol/hytale-f2p/releases/download/latest"
     }
   }
 }