Fix typo in UPGRADING_v6.md

jfcherng · jfcherng · commit c52f66b22423 · 2019-04-23T14:18:39.000+08:00
Signed-off-by: Jack Cherng &lt;jfcherng@gmail.com&gt;
diff --git a/UPGRADING/UPGRADING_v6.md b/UPGRADING/UPGRADING_v6.md
@@ -1,7 +1,7 @@
 ## Upgrading to v6
 
 
-### For Simple User
+### For Simple Users
 
 If you only use the `DiffHelper` and built-in `Renderer`s,
 there is no breaking change for you so you do not have to do anything.
