Bump OpenTelemetry.Instrumentation.AspNetCore from 1.7.1 to 1.8.1#26

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dependabot/nuget/samples/CuttingEdge/AspireCloudStack/AspireCloudStack.ServiceDefaults/OpenTelemetry.Instrumentation.AspNetCore-1.8.1dogaaydinn/CSharp-Covariance-Polymorphism-Exercises:dependabot/nuget/samples/CuttingEdge/AspireCloudStack/AspireCloudStack.ServiceDefaults/OpenTelemetry.Instrumentation.AspNetCore-1.8.1Copy head branch name to clipboard