Changed the check for Red Hat forks

Instead of checking for the new CentOS forks IDs, the check is made on the file "redhat-release".

This should include any future fork without the need to update this script.

I kept the check in the "get_distribution()" function, but let me know if it would make sense to have a  "check_forked_redhat()" function instead, in order to stay aligned with the current script logic.

install.sh

@@ -121,12 +121,13 @@ get_distribution() {
 		lsb_dist="$(. /etc/os-release && echo "$ID")"
 	fi
 	# Updates the "lsb_dist" variable for the CentOS forks
-	# new IDs will be updated in the future.
-	case "$lsb_dist" in
-		almalinux)
+	# by checking the file "redhat-release" present in the Red Hat based distros.
+	if [ -r /etc/redhat-release ]; then
+        	if ! egrep -i "centos|redhat|red hat|fedora" /etc/redhat-release; then
+			echo "Forked distribution, switching to CentOS ID"
 			lsb_dist="centos"
-			;;
-	esac
+		fi
+	fi
 	# Returning an empty string here should be alright since the
 	# case statements don't act unless you provide an actual value
 	echo "$lsb_dist"