Fix `db` command syntax

[XVilka]

Do not use db 0x00000 but db @ 0x000000, etc. Check other commands too

[mudassirl6]

Hi, I’m new to open-source and would like to work on this issue.
My plan is to search the documentation for occurrences of “db 0x…” and update them to the correct “db @ 0x…” syntax.
I will also check similar commands (dw, dd, etc.) for the same issue.
Please assign this to me.