Add higlight to normal pstree calls

dotfiles/bash/main.bashrc

 alias tasks='task rc.context:none'
 alias ts='ts "%F %T"'
 alias lsblk='lsblk -o +UUID,LABEL'
+alias pstree='pstree -h'
 alias virsh='virsh --connect qemu:///system'
 alias wttr='curl -s "wttr.in/?1&n&q"'
 alias xaa='xclip -o | audit2allow'