Update Swatinem/rust-cache action to v2.8.0

Author: renovate[bot]

.github/workflows/rust.yml

@@ -109,7 +109,7 @@ jobs:
           target: ${{ matrix.info.target }}
 
       - name: Enable Rust cache
-        uses: Swatinem/rust-cache@v2.7.3
+        uses: Swatinem/rust-cache@v2.8.0
         if: ${{ github.event_name != 'pull_request' || ! github.event.pull_request.head.repo.fork }} # If it is a PR, only if not a fork
         with:
           shared-key: build-cache-${{ matrix.info.target }}