Bump to beta-11 for Fabric 1.21.8 update

Author: mikeprimm

build.gradle

@@ -47,7 +47,7 @@ allprojects  {
   apply plugin: 'java'
 
   group = 'us.dynmap'
-  version = '3.7-SNAPSHOT'
+  version = '3.7-beta-11'
 
 }