Fix typo in comment.

src/backend/executor/nodeForeignscan.c

@@ -238,7 +238,7 @@ ExecInitForeignScan(ForeignScan *node, EState *estate, int eflags)
 	 * see ExecInitModifyTable.
 	 *
 	 * Don't try to look up the ResultRelInfo when EvalPlanQual is active,
-	 * though.  Direct modififications cannot be re-evaluated as part of
+	 * though.  Direct modifications cannot be re-evaluated as part of
 	 * EvalPlanQual.  The lookup wouldn't work anyway because during
 	 * EvalPlanQual processing, EvalPlanQual only initializes the subtree
 	 * under the ModifyTable, and doesn't run ExecInitModifyTable.