Use `license = "Apache-2.0"` in all templates

[simonw]

I've been using this:

https://github.com/simonw/python-lib/blob/5ec8076eaa559928d2068d188dfed24ffcaf3b04/%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml#L8

But now I'm getting warnings from python -m build about it.

Should be:

license = "Apache-2.0"

TODO:

• [x] https://github.com/simonw/python-lib/blob/main/%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml
• [x] https://github.com/simonw/llm-plugin/blob/main/llm-%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml
• [x] https://github.com/simonw/datasette-plugin/blob/main/datasette-%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml
• [x] https://github.com/simonw/django-plugin/blob/main/%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml
• [x] https://github.com/simonw/sqlite-utils-plugin/blob/main/sqlite-utils-%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml
• [x] https://github.com/simonw/click-app/blob/main/%7B%7Bcookiecutter.hyphenated%7D%7D/pyproject.toml