add codecov token

Author: fgerick

.github/workflows/CI.yml

@@ -42,6 +42,7 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with:
+          token: ${{ secrets.CODECOV_TOKEN }}
           files: lcov.info
   docs:
     name: Documentation