Bump Azure.Identity from 1.17.1 to 1.20.0#212

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dependabot/nuget/samples/durable-functions/dotnet/AiAgentTravelPlanOrchestrator/Azure.Identity-1.20.0Azure-Samples/Durable-Task-Scheduler:dependabot/nuget/samples/durable-functions/dotnet/AiAgentTravelPlanOrchestrator/Azure.Identity-1.20.0Copy head branch name to clipboard