CSHARP-5041: Semantic Kernel integration is failing due to .NET 8 SDK change

Author: BorisDog

semantic-kernel-csharp/run.sh

@@ -11,7 +11,7 @@ mkdir -p "$DOTNET_SDK_PATH"
 echo "Downloading .NET SDK installer into $DOTNET_SDK_PATH folder..."
 curl -Lfo "$DOTNET_SDK_PATH"/dotnet-install.sh https://dot.net/v1/dotnet-install.sh
 echo "Installing .NET LTS SDK..."
-bash "$DOTNET_SDK_PATH"/dotnet-install.sh --channel 6.0 --install-dir "$DOTNET_SDK_PATH" --no-path
+bash "$DOTNET_SDK_PATH"/dotnet-install.sh --channel 8.0 --install-dir "$DOTNET_SDK_PATH" --no-path
 
 # Set SkipReason to null to enable tests
 sed -i -e 's/"MongoDB Atlas cluster is required"/null/g' dotnet/src/IntegrationTests/Connectors/Memory/MongoDB/MongoDBMemoryStoreTests.cs