Added copyright header to pass repo open source checks

Author: Sidharth123-cpu

generate-site.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const fs = require('fs');
 const path = require('path');
 
@@ -148,4 +155,4 @@ ${entry.Additional_Info.map(info => `- ${info}`).join('\n')}
   console.log(`Generated ${Object.keys(registry).length} individual GBID pages`);
 }
 
-generateSite(); 
+generateSite();