fix github action

Author: fiji-flo

.github/workflows/rust.yml

@@ -31,7 +31,7 @@ jobs:
     - name: Run fmt
       run: cargo fmt --all -- --check
     - name: Clippy
-      run: cargo clippy --all --all-features -- -D warning
+      run: cargo clippy --all --all-features -- -D warnings
     - name: Build
       run: cargo build --all --all-features --verbose
     - name: Run tests