[Minor] removes reference to pwsh in the workflows

Author: remyCases

.github/workflows/publish.yaml

@@ -109,7 +109,7 @@ jobs:
       # If some rules are not applicable, you can disable them
       # using the --excluded-rules or --excluded-rule-ids option
       - name: Validate package
-        run: meziantou.validate-nuget-package (Get-ChildItem "${{ env.NuGetDirectory }}/*.nupkg")
+        run: meziantou.validate-nuget-package ${{ env.NuGetDirectory }}/*.nupkg
 
   run_test:
     runs-on: ubuntu-latest