Bump OpenTelemetry.Exporter.OpenTelemetryProtocol from 1.12.0 to 1.15.3#291

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dependabot/nuget/dotnet/semantic-kernel/sample-agent/OpenTelemetry.Exporter.OpenTelemetryProtocol-1.15.3microsoft/Agent365-Samples:dependabot/nuget/dotnet/semantic-kernel/sample-agent/OpenTelemetry.Exporter.OpenTelemetryProtocol-1.15.3Copy head branch name to clipboard