ci: fix continue if codecov fails

.github/workflows/cd.yml

@@ -56,6 +56,7 @@ jobs:
       - name: Run tests
         run: cargo tarpaulin --out Xml --verbose
       - name: Upload reports to codecov
+        continue-on-error: true
         uses: codecov/codecov-action@v3
         with:
           name: code-coverage-report