.Net: Bump NRedisStack from 0.6.1 to 0.8.0 in /dotnet (#1855)

Bumps NRedisStack from 0.6.1 to 0.8.0.


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dotnet/Directory.Packages.props

@@ -11,7 +11,7 @@
     <PackageVersion Include="Microsoft.Bcl.HashCode" Version="[1.1.0, )" />
     <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="6.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Http" Version="6.0.0" />
-    <PackageVersion Include="NRedisStack" Version="0.6.1" />
+    <PackageVersion Include="NRedisStack" Version="0.8.0" />
     <PackageVersion Include="Pgvector" Version="0.1.3" />
     <PackageVersion Include="Polly" Version="7.2.4" />
     <PackageVersion Include="System.Linq.Async" Version="6.0.1" />