Add missing description to windows_feature_powershell
Add missing description to windows_feature_powershell

This was left empty by mistake.

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

Tensibai/chef,chef/chef,tomdoherty/chef,chef/chef,higanworks/chef,nvwls/chef,jaymzh/chef,mwrock/chef,MsysTechnologiesllc/chef,MsysTechnologiesllc/chef,gene1wood/chef,jaymzh/chef,nvwls/chef,martinisoft/chef,jaymzh/chef,chef/chef,martinisoft/chef,mwrock/chef,higanworks/chef,MsysTechnologiesllc/chef,tomdoherty/chef,nvwls/chef,jaymzh/chef,martinisoft/chef,tas50/chef-1,tas50/chef-1,Tensibai/chef,MsysTechnologiesllc/chef,mwrock/chef,tomdoherty/chef,higanworks/chef,mattray/chef,Tensibai/chef,gene1wood/chef,martinisoft/chef,tomdoherty/chef,Tensibai/chef,mwrock/chef,gene1wood/chef,mattray/chef,mattray/chef,higanworks/chef,nvwls/chef,nvwls/chef,mattray/chef,higanworks/chef,martinisoft/chef,tas50/chef-1,mattray/chef,gene1wood/chef,Tensibai/chef,tas50/chef-1,nvwls/chef,tomdoherty/chef,chef/chef