Update version to 1.7.4

[alvarobartt]

What does this PR do?

This PR updates the version in Cargo.toml before the 1.7.4 release, that brings a fix for Qwen3 on CPU/MPS when performing batched inference in FP16.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline, Pull Request section?
• Was this discussed/approved via a GitHub issue or the forum? Please add a link to it if that's the case.
• Did you make sure to update the documentation with your changes? Here are the documentation guidelines, and here are tips on formatting docstrings.
• Did you write any new necessary tests?

Who can review?

@Narsil