drum_kit file updated, keypress replaced with keydown

[deeproop]

🛠️ Fixes Issue #846

Closes #846

👨‍💻 Changes proposed

"Keypress" is replaced with "keydown" in assets\Js\drum_kit.js for key press event listener.

✅ Check List (Check all the applicable boxes)

• [ ] My code doesn't break any part of the project (Zero Octave-Javascript-Projects).
• [ ] This PR does not contain plagiarized content.
• [ ] My Addition/Changes works properly and matches the overall repo pattern.
• [ ] The title of my pull request is a short description of the requested changes.

[Astrodevil]

it's not working

[github-actions[bot]]

Thank you @deeproop for taking out your valuable time in order to contribute to our project. Looking forward for more such amazing contributions :)