Reverse action done into General Settings

Hello,

I just messed up big time on my backend, and I dont know how to reverse it.
Without knowing, I did this :

In the box for WordPress address (URL): change the address to the new location of your main WordPress core files. Example: https://example.com/wordpress
In the box for Site address (URL): change the address to the root directory’s URL. Example: https://example.com
Click Save Changes. (Do not worry about the error message and do not try to see your blog at this point! You will probably get a message about file not found.)

I need to cancel it as obviously I can not accept to anything on my website.

Can you please tell me where I am suppose to go to change the URL entered, back to the other URL I had before?
Is it directly into a php file or am I suppose to change it into the Database? if in the database, please tell me where exactly?

Thanks
Jb