chore(deps): bump actions-rust-lang/setup-rust-toolchain from 1 to 2

Bumps [actions-rust-lang/setup-rust-toolchain](https://github.com/actions-rust-lang/setup-rust-toolchain) from 1 to 2.
- [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@v1...v2)

---
updated-dependencies:
- dependency-name: actions-rust-lang/setup-rust-toolchain
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/contract.yml

@@ -349,7 +349,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: actions-rust-lang/setup-rust-toolchain@v1
+        uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           target: wasm32v1-none
           cache: true