update Include="System.IO.Pipelines" (#216)

Update "System.IO.Pipelines" Version="7.0.0" for the 7.0 framework

Author: Gsantomaggio

RabbitMQ.Stream.Client/RabbitMQ.Stream.Client.csproj

@@ -60,7 +60,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="System.IO.Pipelines" Version="6.0.2" />
+    <PackageReference Include="System.IO.Pipelines" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.0" />
   </ItemGroup>