fix: make symbol package push conditional (only if files exist)

Author: Shewart

.github/workflows/release.yml

@@ -37,9 +37,13 @@ jobs:
     - name: Publish to NuGet
       run: |
         dotnet nuget push src/ShellUI.CLI/bin/Release/*.nupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
-        dotnet nuget push src/ShellUI.CLI/bin/Release/*.snupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
+        if ls src/ShellUI.CLI/bin/Release/*.snupkg 1> /dev/null 2>&1; then
+          dotnet nuget push src/ShellUI.CLI/bin/Release/*.snupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
+        fi
         dotnet nuget push src/ShellUI.Components/bin/Release/*.nupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
-        dotnet nuget push src/ShellUI.Components/bin/Release/*.snupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
+        if ls src/ShellUI.Components/bin/Release/*.snupkg 1> /dev/null 2>&1; then
+          dotnet nuget push src/ShellUI.Components/bin/Release/*.snupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
+        fi
 
     - name: Extract version from tag
       id: version