Add missing array_histogram to list of functions and operators

Author: gertjanal

docs/src/main/sphinx/functions/list.md

@@ -35,9 +35,10 @@
 - {func}`arbitrary`
 - {func}`array_agg`
 - {func}`array_distinct`
-- {func}`array_except`
+- {func}`array_histogram`
 - {func}`array_intersect`
 - {func}`array_join`
+- {func}`array_last`
 - {func}`array_max`
 - {func}`array_min`
 - {func}`array_position`