try fix codecov

Author: joshday

.github/workflows/CI.yml

@@ -46,6 +46,8 @@ jobs:
           git config --global user.email [email protected]
       - uses: julia-actions/julia-runtest@latest
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
-          files: lcov.info
+          # possibly other stuff
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true