docs: typo: german word "verboten" instead of "forbidden"

https://github.com/pypa/hatch/blob/d5f7bfe813dd4d81520def23b43f5d46aad1899c/docs/how-to/config/dynamic-metadata.md?plain=1#L17

Current:

1. If any of those fields have static definitions in pyproject.toml, delete those definitions. It is verboten to define a field statically and dynamically.

Correct:

1. If any of those fields have static definitions in pyproject.toml, delete those definitions. It is forbidden to define a field statically and dynamically.