Bump library/rust from 1.75.0-bookworm to 1.77.2-bookworm in /cargo

Bumps library/rust from 1.75.0-bookworm to 1.77.2-bookworm.

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

Signed-off-by: dependabot[bot] <support@github.com>

cargo/Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/library/rust:1.75.0-bookworm as rust
+FROM docker.io/library/rust:1.77.2-bookworm as rust
 
 FROM ghcr.io/dependabot/dependabot-updater-core