[Docs] Fix grammar in CPU installation guide

[maryamtahhan]

Purpose

This PR fixes several grammar issues in the CPU installation documentation to improve clarity and readability.

Test Plan

Manual review of the documentation changes. The changes are purely grammatical improvements with no functional impact:

• Fixed "allow vLLM running" → "allow vLLM to run"
• Fixed "bound to a same NUMA node" → "bound to the same NUMA node"
• Fixed "If have any performance problems" → "If you have any performance problems"
• Fixed "it is recommend" → "it is recommended"
• Fixed "When deploy vLLM" → "When deploying vLLM"
• Fixed "on a same NUMA node" → "on the same NUMA node"
• Fixed "Larger batch usually provides" → "A larger batch usually provides"
• Fixed "Tuning max batch size starts from default value" → "Tuning the max batch size starting from the default value"
• Fixed "can provides better performance" → "can provide better performance" (2 instances)

Test Result

No functional changes - documentation only. All grammar corrections improve readability and follow standard English conventions.

Before: "larger setting will allow vLLM running more requests in parallel"
After: "larger setting will allow vLLM to run more requests in parallel"

(See full diff for all corrections)

[github-actions]

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[gemini-code-assist]

Code Review

This pull request introduces a series of grammatical corrections to the CPU installation guide. The changes, such as fixing verb forms, articles, and sentence structures, significantly improve the clarity and readability of the documentation. All the corrections are accurate and well-justified. The pull request successfully achieves its goal of enhancing the documentation quality.

[mergify]

Documentation preview: https://vllm--28461.org.readthedocs.build/en/28461/