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

@@ -8,6 +8,8 @@ sdk_version: 4.36.0
 app_file: app.py
 pinned: true
 short_description: Compare up to 6 image models!
+tags:
+  - not-for-all-audiences
 ---
 
 Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference