ci: 👷 Update Rust toolchain version

[TeddyHuang-00]

Update rust toolchain version to the latest stable. Should solve the issue #156

Side note: I think this might be better than pinning the toolchain version to a specific number. If it is so with other concerns, I shall change that back to something like 1.76.0 which should also work in theory

[TeddyHuang-00]

Also updated the rust-version in Cargo.toml to 1.74.0, as clap_lex v0.7.0 requires for at least, as shown in the error message of https://github.com/astrale-sharp/typstfmt/actions/runs/8081248062/job/22079369708#step:4:94

[astrale-sharp]

Hey there and thanks :)

I think we had somewhat the intention of staying in sync with typst for some reason, opinions @arnaudgolfouse ?

That being said, I don't see a real reason to do that and so I'm in favor of merging this as is.

[TeddyHuang-00]

Well in that case there are still two good reasons:

1. Typst's release workflow also uses stable Rust toolchain: https://github.com/typst/typst/blob/5a03c818c8b595c9bb62613c8da6d7464ccff05c/.github/workflows/release.yml#L40
2. Typst's Cargo toml also set rust-version to 1.74.0: https://github.com/typst/typst/blob/5a03c818c8b595c9bb62613c8da6d7464ccff05c/Cargo.toml#L8

In short this is pretty well-aligned with Typst settings.

[astrale-sharp]

Color me convinced then, thanks for your interest and contribution!

I'm merging this, may I ask what motivated you to do this specific contribution? :)

[TeddyHuang-00]

I'm merging this, may I ask what motivated you to do this specific contribution? :)

Thank you for your fabulous work! I am a huge fan of Typst, where typstfmt is doing a lot of help for me. The direct reason for this PR is that I am maintaining typstfmt-bin on AUR and found out that the the new version doesn't come with linux binaries, so I just dig a little bit to see what I can help 😄

[astrale-sharp]

Oh that's lovely :D