chore(main): release python-openinference-semantic-conventions 0.1.8

[github-actions[bot]]

:robot: I have created a release beep boop

0.1.8 (2024-06-25)

Features

• semcov: guardrail span kind for python (#548) (09e767e)

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[github-actions[bot]]

:robot: Release is at https://github.com/Arize-ai/openinference/releases/tag/python-openinference-semantic-conventions-v0.1.8 :sunflower: