Improve README

Author: andyone

README.md

@@ -34,8 +34,8 @@ go install github.com/essentialkaos/sslcli/v3@latest
 #### From [ESSENTIAL KAOS Public Repository](https://kaos.sh/kaos-repo)
 
 ```bash
-sudo yum install -y https://pkgs.kaos.st/kaos-repo-latest.el$(grep 'CPE_NAME' /etc/os-release | tr -d '"' | cut -d':' -f5).noarch.rpm
-sudo yum install sslcli
+sudo dnf install -y https://pkgs.kaos.st/kaos-repo-latest.el$(grep 'CPE_NAME' /etc/os-release | tr -d '"' | cut -d':' -f5).noarch.rpm
+sudo dnf install sslcli
 ```
 
 #### Prebuilt binaries