Fix coverage path

Author: mosuem

.github/workflows/markdown.yaml

@@ -90,4 +90,4 @@ jobs:
       uses: coverallsapp/github-action@master
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
-        path-to-lcov: coverage/lcov.info
+        path-to-lcov: pkgs/markdown/coverage/lcov.info