You need to edit the email template.
To edit the Abandon Cart email template go to:
Go to Settings--> Notifications---> Abandoned Checkout
To edit the abandoned cart template requires quite a bit of code manipulation, usually, for this task a web developer can help.
This is quite a complex code change and difficult to share the exact changes necessary in a reply here. If you'd like further help with this, you can see the Shopify Expert directory here or reach out to @Nick_Marketing directly to see if he can help too.
Well can you show me the documentation and I can take a look on how to fix it. Though I'm not quite a web developer but I've been coding PHP, html and stuffs for more than 10 years.
And don't forget Shopify is a paid platform already and it is not like woocommerce and wordpress where I can easily figure out the code and add functionalities I like.
I am not proficient with coding by any means, so in terms of an exact solution I wouldn't be too much help. Shopify does however have a help guide for editing and customizing email notifications such as abandoned carts which might be a good place to start for you on this. You can read it here.
If you do feel you need help and aren't completely comfortable adjusting the code in your store, it could be worth reaching out to a Shopify Expert for a small task job to help you.