[pre-commit] Don't require text type for codespell hook

Codespell's .pre-commit-hooks.yaml sets "types: [text]".

Override this using "types: [file]", to make the codespell hook see the same
files as codespell usage outside pre-commit:
...
$ codespell --toml gdb/pyproject.toml gdb*
...

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=34411