Change gh actions rust cache key

- different dependencies -> different cache

.github/actions/check-crate/action.yaml

@@ -10,7 +10,7 @@ runs:
     - name: Rust Cache
       uses: Swatinem/[email protected]
       with:
-        shared-key: unix-rust-testing
+        shared-key: unix-rust-testing-v2
         key: ${{ inputs.features }}
 
     - run: |