STR:
"Preferences -> Cloud & Link -> Clickable Link Settings": check only "Enable".
Paste https://github.com/notepad-plus-plus/notepad-plus-plus.
Hover over the link.

Result:
Only the link underline changes color.

Preferred:
Both link and underline change color.
(The behavior prior to Scintilla 5.3.0).

Notepad++ v8.4.5 (64-bit)
Build time : Sep 12 2022 - 18:38:40
Path : C:---\Notepad++.x64.Release.exe
Command Line :
Admin mode : ON
Local Conf mode : ON
Cloud Config : OFF
OS Name : Windows 10 Pro (64-bit)
OS Version : 20H2
OS Build : 19042.985
Current ANSI codepage : 1255
Plugins :
ComparePlus (1)
HTMLTag (1.3.2)
MenuIcons (1.2.5)
PythonScript (2)
_CustomizeToolbar (4.2)