upgrade swagger-ui version 3.28.0

Author: bnasslahsen

build.gradle

@@ -10,7 +10,7 @@ plugins {
 ext {
 	springBootVersion = '2.3.0.RELEASE'
 	swaggerApiVersion = '2.1.3'
-	swaggerUiVersion = '3.27.0'
+	swaggerUiVersion = '3.28.0'
 }
 
 subprojects {