Update workflow

Author: hugoalh

.github/workflows/publish-psg-module.yml

@@ -4,6 +4,9 @@ on:
     types:
       - "published"
   workflow_dispatch:
+defaults:
+  run:
+    shell: "pwsh"
 jobs:
   publish-psg-module:
     name: "Publish - PowerShell Gallery - Module"
@@ -16,25 +19,19 @@ jobs:
         run: |
           Write-Host -Object "::set-output name=installation-policy::$((Get-PSRepository -Name 'PSGallery').InstallationPolicy)"
           Set-PSRepository -Name 'PSGallery' -InstallationPolicy 'Trusted' -Verbose
-        shell: "pwsh"
       - name: "Setup PowerShellGet"
         run: |
           Install-Module -Name 'PowerShellGet' -MinimumVersion '2.2.5' -Scope 'AllUsers' -AcceptLicense -Verbose
-        shell: "pwsh"
       - name: "Update PowerShell Modules"
         run: |
           Update-Module -Scope 'AllUsers' -AcceptLicense -Verbose
-        shell: "pwsh"
       - name: "Test Publish"
         run: |
           Publish-Module -Path '.\hugoalh.GitHubActionsToolkit\' -NugetAPIKey 'GUID' -WhatIf -Verbose
-        shell: "pwsh"
       - name: "Publish"
         run: |
           Publish-Module -Path '.\hugoalh.GitHubActionsToolkit\' -NugetAPIKey '${{secrets.POWERSHELLGALLERY_TOKEN}}' -Verbose
-        shell: "pwsh"
       - name: "Revert Modify PowerShell Repository"
         if: "${{steps.modify-powershell-repository.outcome == 'success' && always()}}"
         run: |
           Set-PSRepository -Name 'PSGallery' -InstallationPolicy '${{steps.modify-powershell-repository.outputs.installation-policy}}'
-        shell: "pwsh"