fix fatal warning for tonic_build in CI

[ma2bd]

Motivation

fix CI after a semver violation by tonic-build (when building with -D warnings)

Proposal

• Run cargo update
• Apply the suggestion

I didn't add --locked to the line

cargo install --path linera-service --bin linera --bin linera-server --debug

in .github/workflows/docker.yml because I thought most users may not pass --locked.

Test Plan

CI

Release Plan

Nothing to do