Add NFAA tag

Hi, please add the "Not-For-All-Audiences" tag since this content might not be suitable for all audiences. Here's our content policy for reference: https://huggingface.co/content-guidelines

Thank you!

README.md

@@ -7,6 +7,9 @@ sdk: gradio
 sdk_version: 3.27.0
 app_file: app.py
 pinned: false
+tags:
+- not-for-all-audiences
+
 ---
 
 Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference