[Bug]: Fix Increment Functionality in Cart for Accurate Product Quantity Update

[shar2710]

Is there an existing issue for this?

• I have searched the existing issues

What happened ?

When adding products to the cart, the quantity does not increment properly. This results in an incorrect product count in the cart, causing confusion for users who expect an accurate total.
Please assign me with this @DharshiBalasubramaniyam

Add Screenshots

No response

What browsers are you seeing the problem on?

No response

Record

• I agree to follow this project's Code of Conduct
• I'm a GSSoC contributor
• I'm a Hacktoberfest contributor
• I want to work on this issue
• I'm willing to provide further clarification or assistance if needed.

[github-actions]

👋 Thank you @shar2710 for raising an issue! We appreciate your effort in helping us improve. Our team will review it shortly. Stay tuned!

[shar2710]

@DharshiBalasubramaniyam please check. i have created a pull request