fix show functions query for 2025.08 (#1358)

Author: JPryce-Aklundh

modules/ROOT/pages/clauses/listing-functions.adoc

@@ -254,19 +254,17 @@ WHERE name STARTS WITH 'a'
 |===
 | name    | isBuiltIn
 
-| "abs"   | true
-| "abs"   | true
-| "acos"  | true
-| "all"   | true
-| "any"   | true
-| "asin"  | true
-| "atan"  | true
+| "abs" | true
+| "acos" | true
+| "all" | true
+| "allReduce" | true
+| "any" | true
+| "asin" | true
+| "atan" | true
 | "atan2" | true
-| "avg"   | true
-| "avg"   | true
-| "avg"   | true
+| "avg" | true
 
-2+d|Rows: 11
+2+d|Rows: 9
 |===