[WIP] describe 'advanced' value for !#safari_cb_affinity directive

docs/general/ad-filtering/create-own-filters.md

@@ -4658,6 +4658,7 @@ where:
     - `other` — AdGuard Other content blocker
     - `custom` — AdGuard Custom content blocker
     - `all` — special keyword that means that the rules must be included into **all** content blockers
+    - `advanced` — special keyword to apply rules by the [Advanced protection](/adguard-for-ios/features/advanced-protection) module
 - `rules_list` — list of rules
 - `!#safari_cb_affinity` — end of the block
 
@@ -4677,6 +4678,21 @@ example.org#@#.adBanner
 !#safari_cb_affinity
 ```
 
+```adblock
+! to apply both basic and advanced rules by the Advanced protection module:
+!#safari_cb_affinity(advanced)
+||ads.com/loader.min.js$domain=example.com
+example.com#%#//scriptlet('set-constant', 'test123', '123')
+!#safari_cb_affinity
+```
+
+:::info Compatibility
+
+<!-- FIXME: specify the app version -->
+The `advanced` value for the `!#safari_cb_affinity` directive is supported by AdGuard for iOS v4.x.x or later.
+
+:::
+
 ### Hints
 
 "Hint" is a special comment, instruction to the filters compiler used on the server side (see [FiltersRegistry]).