Rename privacy caveat heading to 'Limitations on privacy'

models.md

@@ -30,7 +30,7 @@ but *where* it runs. The provider part tells you the value it stands for:
 > on in an upcoming change — we'll email members before that happens. GreenPT
 > models already use the `greenpt/` prefix.
 
-## The honest caveat
+## Limitations on privacy
 
 Only **Tinfoil** offers architectural privacy. The other providers are chosen
 for their value (renewable energy, public models) but do not run in enclaves —