runtime(doc): fix inconsistent indent (#14089)

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/ft_sql.txt b/runtime/doc/ft_sql.txt
index f98b062..110784d 100644
--- a/runtime/doc/ft_sql.txt
+++ b/runtime/doc/ft_sql.txt
@@ -371,7 +371,7 @@
     'sqlKeyword'	   - Display the items for the sqlKeyword highlight
 			     group
     'sqlKeyword\w*'	   - A second option available with Vim 7.4 which
-                             uses a regular expression to determine which
+			     uses a regular expression to determine which
 			     syntax groups to use
     )<CR>		   - Execute the :let command
     <C-X><C-O>		   - Trigger the standard omni completion key stroke.