[sqlite] Documentation Typo in FTS Example

[Casey Rodarmor]

>From https://sqlite.org/fts3.html:

CREATE TABLE t2(id INTEGER PRIMARY KEY, a, b, c, d);
CREATE VIRTUAL TABLE t3 USING fts4(content="t2", b, c);

INSERT INTO t2 VALUES(2, 'a b', 'c d', 'e f');
INSERT INTO t2 VALUES(3, 'g h', 'i j', 'k l');


The two inserts will fail, since t2 has 5 columns but 4 values were
supplied.