Update SOUP_BRANCH to use 3/main instead of 2.4/main

salt/manager/tools/sbin/soup

@@ -305,7 +305,7 @@ clone_to_tmp() {
   # Make a temp location for the files
   mkdir -p /tmp/sogh
   cd /tmp/sogh
-  SOUP_BRANCH="-b 2.4/main"
+  SOUP_BRANCH="-b 3/main"
   if [ -n "$BRANCH" ]; then
     SOUP_BRANCH="-b $BRANCH"
   fi