upgrade codecov-action to v4

Author: Ivansete-status

.github/workflows/codecov.yml

@@ -47,9 +47,9 @@ jobs:
           mkdir /tmp/cov;
           grcov . --binary-path ./target/debug/ -s . -t lcov --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o /tmp/cov/tests.lcov;
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          directory: /tmp/cov/
+          files: /tmp/cov/tests.lcov
           name: waku-bindings-codecov
           fail_ci_if_error: true