Package: use snupkg debug symbols

now that NuGet bug has been resolved NuGet/Home#10791

Author: swharden

src/Spectrogram/Spectrogram.csproj

@@ -17,7 +17,7 @@
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <DebugType>portable</DebugType>
     <IncludeSymbols>true</IncludeSymbols>
-    <!--<SymbolPackageFormat>snupkg</SymbolPackageFormat> -->    <!-- https://github.com/NuGet/Home/issues/10791 -->
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <Deterministic>true</Deterministic>
     <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>