The following URL for downloading PCRE2 is already invalid.
Because https://www.pcre.org/ says "Note that the former ftp.pcre.org FTP site is no longer available. You will need to update any scripts that download PCRE source code to download via HTTPS, Git, or Subversion from the new home on GitHub instead.".
Therefore, We fail to build MariaDB 10.5 or later for Windows.
Because MariaDB can't download PCRE2 source codes when MariaDB is built by CMake.
We need to use the following URL for downloading PCRE2 source codes.