use java11 in readme

CarlyLanglois · CarlyLanglois · commit 75f2177444d7 · 2021-04-20T17:34:19.000-05:00
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@ course.
 
 ## Requirements
 
-The classes in this repo require Java13. Please refer to the book referenced
+The classes in this repo require Java11. Please refer to the book referenced
 above for instructions on how to download and use the examples.
 
 ## Updating
