Set default run shell to pwsh

Author: andyleejordan

.github/workflows/ci-test.yml

@@ -20,6 +20,9 @@ jobs:
       DOTNET_NOLOGO: true
       DOTNET_CLI_TELEMETRY_OPTOUT: true
       DOTNET_GENERATE_ASPNET_CERTIFICATE: false
+    defaults:
+      run:
+        shell: pwsh
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -32,10 +35,8 @@ jobs:
             6.0.x
             7.0.x
       - name: Install PSResources
-        shell: pwsh
         run: tools/installPSResources.ps1
       - name: Build
-        shell: pwsh
         run: Invoke-Build Build
       - name: Upload build artifacts
         uses: actions/upload-artifact@v3
@@ -44,7 +45,6 @@ jobs:
           name: PowerShellEditorServices
           path: module
       - name: Run tests
-        shell: pwsh
         run: Invoke-Build Test
       - name: Upload test results
         uses: actions/upload-artifact@v3