Adjust indentation in ubl.h

Marlin/ubl.h

@@ -20,15 +20,17 @@
  *
  */
 
-#include "Marlin.h"
-#include "math.h"
-#include "vector_3.h"
-
 #ifndef UNIFIED_BED_LEVELING_H
 #define UNIFIED_BED_LEVELING_H
 
+#include "MarlinConfig.h"
+
 #if ENABLED(AUTO_BED_LEVELING_UBL)
 
+  #include "Marlin.h"
+  #include "math.h"
+  #include "vector_3.h"
+
   #define UBL_VERSION "1.00"
   #define UBL_OK false
   #define UBL_ERR true