doc: update process.binding deprecation text

As part of the recent security release, 4aa0eff updated the
documentation but bd7443a did not.

PR-URL: nodejs#49086
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

doc/api/deprecations.md

@@ -2216,7 +2216,7 @@ Type: Documentation-only (supports [`--pending-deprecation`][])
 `process.binding()` is for use by Node.js internal code only.
 
 While `process.binding()` has not reached End-of-Life status in general, it is
-unavailable when [policies][] are enabled.
+unavailable when [policies][] or the [permission model][] are enabled.
 
 ### DEP0112: `dgram` private APIs
 
@@ -3535,6 +3535,7 @@ Consider using alternatives such as the [`mock`][] helper function.
 [from_string_encoding]: buffer.md#static-method-bufferfromstring-encoding
 [legacy URL API]: url.md#legacy-url-api
 [legacy `urlObject`]: url.md#legacy-urlobject
+[permission model]: permissions.md#permission-model
 [policies]: permissions.md#policies
 [static methods of `crypto.Certificate()`]: crypto.md#class-certificate
 [subpath exports]: packages.md#subpath-exports