improve job name

Author: marcoieni

.github/workflows/ci.yml

@@ -108,7 +108,7 @@ jobs:
       # we do not need. We do this to enable some of the less resource
       # intensive jobs to run on free runners, which however also have
       # less disk space.
-      - name: free up disk space
+      - name: free up some disk space
         uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be
         if: contains(matrix.free_some_disk, true)
         with: