fix: Take underlying type for factory (#1183)

* fix: Take underlying type for factory

* Remove unused file

* Omit unused typed

Co-authored-by: Egil Hansen <egil@assimilated.dk>

* fix: Test that type is assignable

* refactor: Delete unused factory

* Remove unused test for factory

---------

Co-authored-by: Egil Hansen <egil@assimilated.dk>

Author: linkdotnet

.github/nightly-failed.md

@@ -11,6 +11,10 @@ All notable changes to **bUnit** will be documented in this file. The project ad
 - `net8.0` support
 - Increased timeout of `WaitForAssertion` to infinite when a debugger is attached. By [@linkdotnet](https://github.com/linkdotnet).
 
+### Fixed
+
+- AngleSharp IElement extension methods do not work with `IRenderedFragment.Find`. Reported by [a2er](https://github.com/a2er). Fixed by [@linkdotnet](https://github.com/linkdotnet).
+
 ## [1.22.19] - 2023-07-28
 
 ### Added