app: package `ggml-metal.metal` from correct directory

app/forge.config.ts

@@ -27,7 +27,7 @@ const config: ForgeConfig = {
       path.join(__dirname, './assets/iconDarkTemplate@2x.png'),
       path.join(__dirname, './assets/iconDarkUpdateTemplate.png'),
       path.join(__dirname, './assets/iconDarkUpdateTemplate@2x.png'),
-      ...(process.platform === 'darwin' ? ['../llama/ggml-metal.metal'] : []),
+      ...(process.platform === 'darwin' ? ['../llm/ggml-metal.metal'] : []),
     ],
     ...(process.env.SIGN
       ? {