Update error message in makedoc.g

Author: james-d-mitchell

makedoc.g

@@ -5,8 +5,8 @@
 # This file is a script which compiles the package manual.
 #
 if fail = LoadPackage("AutoDoc", "2022.10.20") then
-    Error("AutoDoc version 2018.02.14 or newer is required.");
+    Error("AutoDoc version 2022.10.20 or newer is required.");
 fi;
 
 AutoDoc(rec(scaffold := true, autodoc := true));
-QUIT;
+QUIT;