Update governance.md (#7927)
Update governance.md (#7927)

Removed plural and added comma where necessary.
TravisEz13/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,TravisEz13/PowerShell,JamesWTruher/PowerShell-1,daxian-dbw/PowerShell,daxian-dbw/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,daxian-dbw/PowerShell,JamesWTruher/PowerShell-1,daxian-dbw/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell