Install wkhtmltopdf & wkhtmltoimage on CentOS 9|8

To install wkhtmltopdf and wkhtmltoimage on centOS 9|8; simply download wkhtmlpdf using wget and then run sudo dnf localinstall wkhtmltox-0.12.6-1.centos8.x86_64.rpm command on the terminal or command line to install it. According to https://wkhtmltopdf.org/ :- wkhtmltopdf and wkhtmltoimage are