Update README.md

README.md

@@ -276,7 +276,8 @@ Following are some of the most commonly used constraints available in SQL −
     SELECT column1, column2....columnN
     FROM   table_name
     WHERE  column_name LIKE { PATTERN };
-SQL ORDER BY Clause
+    
+### SQL ORDER BY Clause
     SELECT column1, column2....columnN
     FROM   table_name
     WHERE  CONDITION