Extra semicolon removed from the TTL example

This PR removes an extra semicolon from the TTL example.

docs/en/sql-reference/statements/alter/ttl.md

@@ -34,7 +34,7 @@ CREATE TABLE table_with_ttl
 )
 ENGINE MergeTree()
 ORDER BY tuple()
-TTL event_time + INTERVAL 3 MONTH;
+TTL event_time + INTERVAL 3 MONTH
 SETTINGS min_bytes_for_wide_part = 0;
 
 INSERT INTO table_with_ttl VALUES (now(), 1, 'username1');