Update README.md

README.md

@@ -4,7 +4,7 @@ This is the companion gitlab repository for our [arXiv manuscript](https://arxiv
 
 ## Supplementary materials
 
-### Proofs 
+### Proofs 
 
 The elements of  proof of the main theorems in the core article are detailled in the pdf file 
 [supp_mat_proofs.pdf](https://gricad-gitlab.univ-grenoble-alpes.fr/chatelaf/two-way-kernel-matrix-puncturing/-/blob/master/supp_mat_proofs)