Updates `github.com/urfave/cli/v3` to
[v3.9.0](https://github.com/urfave/cli/releases/tag/v3.9.0) and removes
the renovate pin now that
[urfave/cli#2319](https://github.com/urfave/cli/pull/2319) (the `-c`
help flag parsing fix) is merged.
v3.9.0 prepends the default command name to the root command's args,
which broke the old `Root().Args()` check in `isValidDefaultSubCommand`.
It now uses the command's own `Args()`.
Behavior change: `./gitea web <extra-positional-arg>` now errors with
`unknown command` instead of starting the web server and ignoring the
trailing arg. `web` takes no positional args, so this is stricter (and
arguably more correct) input handling. The intended `./gitea bad-cmd`
rejection is unchanged.
---
This PR was written with the help of Claude Opus 4.7
---------
Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: Nicolas <bircni@icloud.com>
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