Fixed sync-i18n script not working anymore

This is caused by the typescript 4.4 update that changed the catch type from any to unknown

scripts/sync-i18n-files.ts

@@ -275,9 +275,11 @@ function readFileIfExists(pathToFile) {
     try {
       return fs.readFileSync(pathToFile, 'utf8');
     } catch (e) {
+      if (e instanceof Error) {
         console.error('Error:', e.stack);
       }
     }
+  }
   return null;
 }