chore(deps): bump actions-rust-lang/setup-rust-toolchain

Bumps [actions-rust-lang/setup-rust-toolchain](https://github.com/actions-rust-lang/setup-rust-toolchain) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/actions-rust-lang/setup-rust-toolchain/releases)
- [Changelog](https://github.com/actions-rust-lang/setup-rust-toolchain/blob/main/CHANGELOG.md)
- [Commits](actions-rust-lang/setup-rust-toolchain@9399c7b...9d7e65c)

---
updated-dependencies:
- dependency-name: actions-rust-lang/setup-rust-toolchain
  dependency-version: 1.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/cedar_ffi.yaml

@@ -40,7 +40,7 @@ jobs:
           # Remove when released to stable: https://github.com/dart-lang/native/pull/1921
           sdk: main
       - name: Setup Rust
-        uses: actions-rust-lang/setup-rust-toolchain@9399c7bb15d4c7d47b27263d024f0a4978346ba4 # 1.11.0
+        uses: actions-rust-lang/setup-rust-toolchain@9d7e65c320fdb52dcd45ffaa68deb6c02c8754d9 # 1.12.0
       - name: Get Packages
         run: dart pub get
       - name: Test