[FLINK-19449][doc] Fix wrong document for lead and lag

docs/data/sql_functions.yml

@@ -674,10 +674,10 @@ aggregate:
   - sql: ROW_NUMER()
     description: Assigns a unique, sequential number to each row, starting with one, according to the ordering of rows within the window partition. ROW_NUMBER and RANK are similar. ROW_NUMBER numbers all rows sequentially (for example 1, 2, 3, 4, 5). RANK provides the same numeric value for ties (for example 1, 2, 2, 4, 5).
   - sql: LEAD(expression [, offset] [, default])
-    description: Returns the value of expression at the offsetth row before the current row in the window. The default value of offset is 1 and the default value of default is NULL.
-  - sql: LAG(expression [, offset] [, default])
     description: Returns the value of expression at the offsetth row after the current row in the window. The default value of offset is 1 and the default value of default is NULL.
-  - sql: FIRST_VALUE(expression) 
+  - sql: LAG(expression [, offset] [, default])
+    description: Returns the value of expression at the offsetth row before the current row in the window. The default value of offset is 1 and the default value of default is NULL.
+  - sql: FIRST_VALUE(expression)
     description: Returns the first value in an ordered set of values.
   - sql: LAST_VALUE(expression)
     description: Returns the last value in an ordered set of values.