Bump Swatinem/rust-cache from 2.8.0 to 2.8.1

Bumps [Swatinem/rust-cache](https://github.com/swatinem/rust-cache) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/swatinem/rust-cache/releases)
- [Changelog](https://github.com/Swatinem/rust-cache/blob/master/CHANGELOG.md)
- [Commits](Swatinem/rust-cache@v2.8.0...v2.8.1)

---
updated-dependencies:
- dependency-name: Swatinem/rust-cache
  dependency-version: 2.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/testing.yml

@@ -19,7 +19,7 @@ jobs:
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
       - name: Cache dependencies
-        uses: Swatinem/[email protected].0
+        uses: Swatinem/[email protected].1
       - name: Run cargo clippy
         run: cargo clippy --all-targets -- --deny warnings
   fmt:
@@ -31,7 +31,7 @@ jobs:
         run: |
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
       - name: Cache dependencies
-        uses: Swatinem/[email protected].0
+        uses: Swatinem/[email protected].1
       - name: Run cargo fmt
         run: cargo fmt --all -- --check
   python-linting: