build: fix resource replacement

correct usage of resource in userscript

Author: moontai0724

package.json

@@ -18,6 +18,7 @@
       "https://*.gamer.com.tw/*"
     ],
     "grant": [
+      "GM_getResourceText",
       "GM_xmlhttpRequest",
       "GM_setValue",
       "GM_getValue"

scripts/external-resource.ts

@@ -44,7 +44,7 @@ function getExternalTransformMethod(options: PluginOptions) {
       return name;
     })();
 
-    const code = `export default ${resource};`;
+    const code = `export default GM_getResourceText("${resource}");`;
 
     // eslint-disable-next-line consistent-return
     return {