Add step to list jemalloc libraries in CI workflow

Author: kojix2

.github/workflows/ci.yml

@@ -42,6 +42,9 @@ jobs:
       - name: Build jemalloc
         run: bundle exec rake jemalloc:build
 
+      - name: List jemalloc libraries
+        run: ls -lh jemalloc/lib
+
       - name: Build odgi
         run: bundle exec rake odgi:build