docs: fix wording in Sorbet example comment

[Rohan5commit]

Summary

Fix the wording in the Sorbet example comment in examples/demo_sorbet.rb.

Related issue

N/A

Guideline alignment

• CONTRIBUTING: https://github.com/openai/openai-ruby/blob/main/CONTRIBUTING.md

Validation

• Not run; example comment-only change.

[Copilot]

Pull request overview

Updates a Sorbet-related explanatory comment in the Ruby SDK’s Sorbet demo to improve readability and correctness without changing any executable code.

Changes:

• Adjusted wording/punctuation in a comment to correct “infact” → “in fact” and improve clarity.

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[jbeckwith-oai]

thanks!

[jbeckwith-oai]

Thanks again @Rohan5commit for catching this and opening the fix. I opened #290 from an openai/openai-ruby branch with the same change and preserved your original commit authorship there.

Closing this PR in favor of #290, and we appreciate the contribution!