Bump version to 0.16.6

[zed-zippy]

This PR bumps the version of this extension to v0.16.6

[vitallium]

@MrSubidubi Hi! Can you please help with the extension workflows? For some reason, the run_tests action started failing with missing stdlib.h header. Thanks!

[MrSubidubi]

Should all work again. Sorry for the inconvenience and thanks for the ping!

[MrSubidubi]

Okay, the test failure here seems correct and https://github.com/zed-extensions/ruby/actions/runs/21814073408/job/63038055625 still fails on main. I am not very keen to bump the timeout again, at least not without a compelling reason. Is there any reason why you are not using the Tree-sitter ruby version from crates.io?

[vitallium]

Is there any reason why you are not using the Tree-sitter ruby version from crates.io?

The idea is in using exact the same versions as we have in the extension.toml file. But, we use released versions, so I think we can switch to crates.io. I've opened a PR with that change - #252

[vitallium]

Seems to work. Thanks for the suggestion!

[MrSubidubi]

Thanks for checking! The Git repository of that Tree-sitter grammar seemed to be quite heavy for some reason, hence making the checks fail on main.