Update Jdk version to 11 in Readme.md

Change-Id: I1a7c95a44d9d9995c8c3d9b6029f8ddcf9c31023
diff --git a/README.md b/README.md
index 3f37e2e..f441322 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@
 # Setup
 
 
-Prerequisites: Jdk 1.8, Git, Maven 3
+Prerequisites: Jdk 11, Git, Maven 3
 
 Clone the latest version of Kustvakt
 <pre>