Update pyenv2.sh

misc/pyenv2.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+if command -v pveversion >/dev/null 2>&1; then echo -e "⚠️  Can't Install on Proxmox "; exit; fi
 set -e
 echo "Installing Python 3.10.8"
 pyenv install 3.10.8 &>/dev/null