trying to fix formatting equation

README.rst

@@ -15,7 +15,7 @@ on the val/test clients:
 
 .. math::
 
-    \max_{\theta} \sum_{k=0}^{K} m(f_{\theta}(X_{k}), y_{k})
+    `\max_{\theta} \sum_{k=0}^{K} m(f_{\theta}(X_{k}), y_{k})`
 
 
 where $K$ stands for the number of clients participating in the