[BUG] SmolagentsInstrumentor output.value type error

[SrilakshmiC]

Describe the bug
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Error Message for openInference output value:
"WARNING:opentelemetry.attributes:Invalid type ChatMessage for attribute 'output.value' value. Expected one of ['bool', 'str', 'bytes', 'int', 'float'] or a sequence of those types"

To Reproduce
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4. See error

Expected behavior
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Environment (please complete the following information):

• OS: [e.g. MacOS]
• Notebook Runtime [e.g. Jupyter, Colab]
• Browser [e.g. chrome, safari]
• Version [e.g. 0.0.1]

Additional context
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https://colab.research.google.com/drive/1l3JtdCECJubjp34XnZoVYVDAaGrgcZTk?usp=sharing

[axiomofjoy]

Thanks so much for filing @SrilakshmiC! I'm transferring this issue to the openinference repo.