[ImgBot] Optimize images (#54)

## Beep boop. Your images are optimized!

Your image file size has been reduced by **35%** 🎉

<details>
<summary>
Details
</summary>

| File | Before | After | Percent reduction |
|:--|:--|:--|:--|
| /docs/images/openai-review-conversation.png | 255.55kb | 165.71kb |
35.15% |
</details>

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