In the Rust Cache step of this job, we got the following warning:

Warning: The `save-state` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

It seems like the warning is being generated by https://github.com/Swatinem/rust-cache, although I'm not positive. We should figure out where the warning is coming from; if it's something we can fix on our side, we should do it. If it's something that will need to be fixed in rust-cache, we should at least file an issue there.