Update learning-powershell.md
Update learning-powershell.md

Removing the world "Professional" after DevOps
bmanikm/PowerShell,JamesWTruher/PowerShell-1,KarolKaczmarek/PowerShell,kmosher/PowerShell,daxian-dbw/PowerShell,TravisEz13/PowerShell,TravisEz13/PowerShell,KarolKaczmarek/PowerShell,jsoref/PowerShell,JamesWTruher/PowerShell-1,kmosher/PowerShell,kmosher/PowerShell,bingbing8/PowerShell,bingbing8/PowerShell,bmanikm/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,TravisEz13/PowerShell,jsoref/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,KarolKaczmarek/PowerShell,bingbing8/PowerShell,PaulHigin/PowerShell,daxian-dbw/PowerShell,PaulHigin/PowerShell,jsoref/PowerShell,KarolKaczmarek/PowerShell,jsoref/PowerShell,kmosher/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,bmanikm/PowerShell,bmanikm/PowerShell,bingbing8/PowerShell,jsoref/PowerShell,JamesWTruher/PowerShell-1,KarolKaczmarek/PowerShell,kmosher/PowerShell,TravisEz13/PowerShell