fix: opentelemetry-instrumentation-openai-v2 version in example

[jinjiaKarl]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

I encountered the following error while attempting to run the example using opentelemetry-instrumentation-openai-v2 with openai.

ERROR: No matching distribution found for opentelemetry-instrumentation-openai-v2~=2.2b0

Fixes # (issue)

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Updated the version with the latest opentelemetry-instrumentation-openai-v2 2.1b0

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] Test A

The pip3 install -r requirements.txt is successfuly

Does This PR Require a Core Repo Change?

• [ ] Yes. - Link to PR:
• [x] No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• [x] Followed the style guidelines of this project
• [ ] Changelogs have been updated
• [ ] Unit tests have been added
• [ ] Documentation has been updated

[linux-foundation-easycla[bot]]

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• :white_check_mark: login: jinjiaKarl / name: jinjia (ebf2fd1c31d39cee498ea8e2e11bf4794ce97a1e, e735ba161d6649d5fe6b99dca0e903a9c2bf83ad)
• :white_check_mark: login: xrmx / name: Riccardo Magliocchetti (130eb6302a8d08e44b18a1457ce1d648ad4a3000, 556b0cf74e7c59e06c02376098c77417438a03ff, 514ff8fe58e33cc5f6c663664027c11a74596f72)

[jinjiaKarl]

ping other codeowners @codefromthecrypt @nirga @lmolkova thanks!