docs: fix 'allow to' grammar in CogVideoX LoRA README

[mrchatam]

Description

Fix grammar in the CogVideoX LoRA README: "allow to control" → "allow you to control".

Checklist

• Documentation only / examples README typo fix

[github-actions]

Hi @mrchatam, thanks for the PR! It does not appear to link an issue it fixes. If this PR addresses an existing issue, please add a closing keyword (e.g. Fixes #1234) to the PR description so the issue is linked. See the contribution guide for more details. If this PR intentionally does not fix a tracked issue, a maintainer can add the no-issue-needed label to silence this reminder.

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