Update CI Publish Workflow (#600)

Update publish.yml:
Remove reference to NuspecFile=Ical.Net.nuspec (deleted)

Author: axunonb

.github/workflows/publish.yml

@@ -49,7 +49,7 @@ jobs:
       run: |
         dotnet restore
         dotnet build --configuration Release Ical.Net/Ical.Net.csproj -p:Version=${{env.VERSION}} -p:FileVersion=${{env.VERSION}}.${{github.run_number}} -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg -p:ContinuousIntegrationBuild=true
-        dotnet pack --configuration Release Ical.Net/Ical.Net.csproj -p:Version=${{env.VERSION}} -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg --no-build -p:PackageVersion=${{env.VERSION}}.${{github.run_number}} -p:NuspecFile=Ical.Net.nuspec
+        dotnet pack --configuration Release Ical.Net/Ical.Net.csproj -p:Version=${{env.VERSION}} -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg --no-build -p:PackageVersion=${{env.VERSION}}.${{github.run_number}}
     - name: Store artifacts
       uses: actions/upload-artifact@v4
       with: