Optimize PVE Manager Version-Check (#1866)

misc/post-pve-install.sh

@@ -231,7 +231,7 @@ while true; do
   esac
 done
 
-if ! pveversion | grep -Eq "pve-manager/8.[0-3]"; then
+if ! pveversion | grep -Eq "pve-manager/8\.[0-3](\.[0-9]+)*"; then
   msg_error "This version of Proxmox Virtual Environment is not supported"
   echo -e "Requires Proxmox Virtual Environment Version 8.0 or later."
   echo -e "Exiting..."