docs: update windows recommended page with corrected info (#4965)

There is a WinCache release which supports PHP 8

https://pecl.php.net/package/WinCache/2.0.0.9

Author: fullmetalsheep

install/windows/recommended.xml

@@ -31,7 +31,6 @@ opcache.enable_cli=On
   <para>
    It is recommended to use WinCache if using IIS, especially if in a shared
    web hosting environment or using networked file storage (NAS).
-   Note that WinCache is no longer supported as of PHP 8.0.0.
 
    All PHP Applications automatically benefit from WinCache's file cache feature. File system operations are cached in memory.