Fix missing conversion from symbol to string for dotnet-sdk
Fix missing conversion from symbol to string for dotnet-sdk

Co-authored-by: Jackson Feeny <c36636f229e2e0887bbecb5e06d5626818aed501@gmail.com>

cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci