additional information that Git LFS is required (review A)

paper/csf-supplementary/usenix-a.tex

@@ -115,8 +115,9 @@ On a side note, I failed to compile the project: setting up an opam switch with
   No solution found, exiting"}}
 \begin{answer}
   We were not able to reproduce this error, but
-  now make the code available in an anonymous GitHub repository that also contains
-  a virtual-machine image with all software that is required to reproduce the proofs.
+  in addition to making the code available in an anonymous GitHub repository,
+  we also provide a virtual-machine image containing all software required to reproduce the proofs.
+  Note that to access this image, the Git Large File Storage extension is required.
 \end{answer}
 
 Here are a few linear comments: