Remove $ prompt symbol from forge install and npm install command in README

[Learnedprawn]

The forge install command in the README includes a $ at the beginning:

$ forge install openzeppelin/openzeppelin-contracts

When copying and pasting, the $ needs to be manually removed, which can be a small inconvenience for users.

Suggestion:
Remove the $ to make the command directly copy-pasteable:

forge install openzeppelin/openzeppelin-contracts

Thanks!

[ernestognw]

Hi, we consider this is a non-issue. It's pretty common that libraries do set the $ char in their guides