docs: fix social card in README

[shinGangan]

🔗 Linked issue

❓ Type of change

• [x] 📖 Documentation (updates to the documentation or readme)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Social cards in docs/README.md were not displayed. After investigating the cause, it appears that the image file name has been changed.

before

📝 Checklist

• [ ] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

[shinGangan]

Hi @farnabaz , please review when you have a time 🙏

The priority is low because it fixed docs. If there are priority reviews, please prioritize them.