Added FMCG in nifty folder

[Aditijainnn]

🛠️ Related Issue

• Closes #[issue_number]
• 💡[FEATURE]: stock price prediction of fmcg sector #569

📝 Description

stock price prediction of fmcg sector

🔍 Type of PR

• 🐛 Bug fix
• ✨ Feature enhancement
• 📚 Documentation update
• 🛑 Other (specify): _______________

✅ Checklist

• I have performed a self-review of my code.
• I have read and followed the Contribution Guidelines.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have commented my code, particularly in hard-to-understand areas.

[Akshat111111]

I have said to add inside the pre-existing folder but you have closed that PR and now repeating the same mistake