Fix up Oh-my-Posh compatibility with 24.0.7

[Codecity001]

Error Message: Error: unknown command "pwsh" for "oh-my-posh"
Fix:

1. Powershell config file needs updated command for oh-my-posh
   Old: oh-my-posh --init --shell pwsh --config $omp_config | Invoke-Expression
   Fixed: oh-my-posh init pwsh --config $omp_config | Invoke-Expression