build(deps): bump Swatinem/rust-cache from 1 to 2

Bumps [Swatinem/rust-cache](https://github.com/Swatinem/rust-cache) from 1 to 2.
- [Release notes](https://github.com/Swatinem/rust-cache/releases)
- [Changelog](https://github.com/Swatinem/rust-cache/blob/master/CHANGELOG.md)
- [Commits](Swatinem/rust-cache@v1...v2)

---
updated-dependencies:
- dependency-name: Swatinem/rust-cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: .github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
         toolchain: ${{ matrix.rust }}
         profile: minimal
         override: true
-    - uses: Swatinem/rust-cache@v1
+    - uses: Swatinem/rust-cache@v2
     - name: Build
       run: cargo test --no-run
     - name: Test