Fix NuGet sign stage

Author: jfversluis

.github/workflows/dotnet-build.yml

@@ -290,23 +290,23 @@ jobs:
       - name: Remove MediaElement package if that is not being released
         if: startsWith(github.ref, 'refs/tags/') && !endsWith(github.ref, '-mediaelement')
         run: |
-          ${{ github.workspace }}/packages/**/*.nupkg | Where-Object { $_ -notmatch "CommunityToolkit.Maui.MediaElement" } | Remove-Item -Force
+          Get-ChildItem -Path "${{ github.workspace }}/packages" -Recurse -Filter "*.nupkg" | Where-Object { $_ -notmatch "CommunityToolkit.Maui.MediaElement" } | Remove-Item -Force
 
       - name: Remove Camera package if that is not being released
         if: startsWith(github.ref, 'refs/tags/') && !endsWith(github.ref, '-camera')
         run: |
-          ${{ github.workspace }}/packages/**/*.nupkg | Where-Object { $_ -notmatch "CommunityToolkit.Maui.Camera" } | Remove-Item -Force
+          Get-ChildItem -Path "${{ github.workspace }}/packages" -Recurse -Filter "*.nupkg" | Where-Object { $_ -notmatch "CommunityToolkit.Maui.Camera" } | Remove-Item -Force
 
       - name: Remove Maps package if that is not being released
         if: startsWith(github.ref, 'refs/tags/') && !endsWith(github.ref, '-maps')
         run: |
-          ${{ github.workspace }}/packages/**/*.nupkg | Where-Object { $_ -notmatch "CommunityToolkit.Maui.Maps" } | Remove-Item -Force
+          Get-ChildItem -Path "${{ github.workspace }}/packages" -Recurse -Filter "*.nupkg" | Where-Object { $_ -notmatch "CommunityToolkit.Maui.Maps" } | Remove-Item -Force
 
       - name: Remove Core & Main package if that is not being released
         if: startsWith(github.ref, 'refs/tags/') && (!endsWith(github.ref, '-mediaelement') && !endsWith(github.ref, '-camera') && !endsWith(github.ref, '-maps'))
         run: |
-          ${{ github.workspace }}/packages/**/*.nupkg | Where-Object { $_ -notmatch "CommunityToolkit.Maui" } | Remove-Item -Force
-          ${{ github.workspace }}/packages/**/*.nupkg | Where-Object { $_ -notmatch "CommunityToolkit.Maui.Core" } | Remove-Item -Force
+          Get-ChildItem -Path "${{ github.workspace }}/packages" -Recurse -Filter "*.nupkg" | Where-Object { $_ -notmatch "CommunityToolkit.Maui" } | Remove-Item -Force
+          Get-ChildItem -Path "${{ github.workspace }}/packages" -Recurse -Filter "*.nupkg" | Where-Object { $_ -notmatch "CommunityToolkit.Maui.Core" } | Remove-Item -Force
 
       - name: Install Signing Tool
         run: dotnet tool install --tool-path ./tools sign --version 0.9.1-beta.23356.1