* add sample demonstrating the use of agents in workflows * Update dotnet/samples/Catalog/AgentsInWorkflows/README.md Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * use type instead of var --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>