restore comment

Author: marcoieni

src/ci/github-actions/jobs.yml

@@ -258,6 +258,8 @@ auto:
     <<: *job-linux-4c
 
   - image: x86_64-gnu-debug
+    # This seems to be needed because a full stage 2 build + run-make tests
+    # overwhelms the storage capacity of the standard 4c runner.
     <<: *job-linux-4c-largedisk
 
   - image: x86_64-gnu-distcheck