Bump Swatinem/rust-cache from 1.3.0 to 1.4.0 (#1286)

Bumps [Swatinem/rust-cache](https://github.com/Swatinem/rust-cache) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/Swatinem/rust-cache/releases)
- [Changelog](https://github.com/Swatinem/rust-cache/blob/v1/CHANGELOG.md)
- [Commits](Swatinem/rust-cache@v1.3.0...v1.4.0)

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

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

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

.github/workflows/examples.yml

@@ -66,7 +66,7 @@ jobs:
           version: 1
 
       - name: Rust Cache
-        uses: Swatinem/rust-cache@v1.3.0
+        uses: Swatinem/rust-cache@v1.4.0
 
       - name: Install `cargo-contract` `master`
         uses: actions-rs/cargo@v1