Bump codecov/codecov-action from 3.1.6 to 4.0.0 (#110)

Author: dependabot[bot]

.github/workflows/code_coverage.yml

@@ -25,6 +25,6 @@ jobs:
           cargo +nightly tarpaulin --verbose --all-features --workspace --timeout 120 --out Xml
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@ab904c41d6ece82784817410c45d8b8c02684457
+        uses: codecov/codecov-action@f30e4959ba63075080d4f7f90cacc18d9f3fafd7
         with:
           fail_ci_if_error: true