remove dir from cov

Author: t-bltg

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
           project: CSV
       - uses: julia-actions/julia-processcoverage@latest
         with:
-          directories: CSV/src,CSV/ext
+          directories: CSV/src
       - uses: codecov/codecov-action@v5
         with:
           files: lcov.info