docs: fix inaccurate content and grammar errors in documentation

[alelpoan]

Description

Fix inaccurate content and grammar errors across documentation pages.

• environments.md: removed duplicate preposition in — a 10ms sync call in at 2,000 concurrent rollouts → a 10ms sync call at 2,000 concurrent rollouts
• faqs.md: removed incorrect statement about the -s flag. The flag saves results to disk (--save-results), not prints sample outputs, as documented in the evaluation.md command reference.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

• All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

Documentation-only change; no code paths affected.

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Note

Low Risk
Low risk documentation-only edits that correct wording and remove an inaccurate CLI flag description; no runtime behavior changes.

Overview
Fixes minor documentation inaccuracies.

Updates docs/environments.md to correct the concurrency example wording in the performance section, and removes an incorrect claim in docs/faqs.md about the -s flag printing sample outputs.

^{Reviewed by Cursor Bugbot for commit 799f997. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Fix inaccurate content and grammar errors in documentation

• Removes an extra word in docs/environments.md so the Performance section reads 'a 10ms sync call at 2,000 concurrent rollouts'.
• Removes an inaccurate sentence about the -s flag printing sample outputs from the quickstart section in docs/faqs.md.

^{Macroscope summarized 799f997.}