chore: rust toolchain needs an upgrade #5
Description
The rust version specified in rust-toolchain.toml (1.76.0) is out of date with the latest stable (1.77.2).
Check the rust version check workflow for details.
This issue was raised by the workflow at https://github.com/lurk-lab/template-rust-lib/actions/runs/8714269031/workflow.