reference librdkafka rc8 (#822)

Author: mhowlett

src/Confluent.Kafka/Confluent.Kafka.csproj

@@ -19,7 +19,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="librdkafka.redist" Version="1.0.0-RC7">
+    <PackageReference Include="librdkafka.redist" Version="1.0.0-RC8">
         <PrivateAssets Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">None</PrivateAssets>
     </PackageReference>
     <PackageReference Include="System.Memory" Version="4.5.0" />

test/Confluent.Kafka.StrongName.UnitTests/Confluent.Kafka.StrongName.UnitTests.csproj

@@ -30,7 +30,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="librdkafka.redist" Version="1.0.0-RC7" />
+    <PackageReference Include="librdkafka.redist" Version="1.0.0-RC8" />
   </ItemGroup>
 
   <ItemGroup>