adding dotnet version in telemetry
adding dotnet version in telemetry

Microsoft/vsts-tasks,Microsoft/vso-agent-tasks,dylan-smith/vso-agent-tasks,Microsoft/vso-agent-tasks,dylan-smith/vso-agent-tasks,Microsoft/vsts-tasks,dylan-smith/vso-agent-tasks,Microsoft/vsts-tasks,Microsoft/vsts-tasks,dylan-smith/vso-agent-tasks,dylan-smith/vso-agent-tasks,Microsoft/vsts-tasks,Microsoft/vso-agent-tasks