fix generation of doc for rocky9

[jburel]

Remove duplicate entry in the doc We currently have

yum -y install epel-release

yum -y install unzip wget bc

# install Java
dnf -y install java-11-openjdk

# install dependencies
dnf -y install python unzip bzip2 wget bc openssl

Now we should have

# install Java
dnf -y install java-11-openjdk

# install dependencies
dnf -y install python unzip bzip2 wget bc openssl