Bump instrumentisto/rust from 1.77.2-buster to 1.78.0-buster (#166)

Bumps [instrumentisto/rust](https://github.com/rust-lang/docker-rust) from 1.77.2-buster to 1.78.0-buster.
- [Commits](https://github.com/rust-lang/docker-rust/commits)

---
updated-dependencies:
- dependency-name: instrumentisto/rust
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/instrumentisto/rust:1.77.2-buster as build
+FROM ghcr.io/instrumentisto/rust:1.78.0-buster as build
 WORKDIR /work/
 COPY . .
 RUN make release \