Fix a typo in a comment in expr.c.

FossilOrigin-Name: 288e934f356ff6276b3e7581ac0f998ca6e93610
diff --git a/src/expr.c b/src/expr.c
index a21ca05..f0bfdb0 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -395,7 +395,7 @@
 ** ensuring that the returned value eventually gets freed.
 **
 ** The caller retains ownership of pVector.  If pVector is a TK_SELECT,
-** then the returne object will reference pVector and so pVector must remain
+** then the returned object will reference pVector and so pVector must remain
 ** valid for the life of the returned object.  If pVector is a TK_VECTOR
 ** or a scalar expression, then it can be deleted as soon as this routine
 ** returns.