Consistently use group:stick in tool recipes

The left-handed recipes for axes were using default:stick instead of
the group:stick used by all other tool recipes.

mods/default/crafting.lua

@@ -212,8 +212,8 @@ minetest.register_craft({
 	output = 'default:axe_wood',
 	recipe = {
 		{'group:wood', 'group:wood'},
-		{'default:stick', 'group:wood'},
-		{'default:stick',''},
+		{'group:stick', 'group:wood'},
+		{'group:stick',''},
 	}
 })
 
@@ -221,8 +221,8 @@ minetest.register_craft({
 	output = 'default:axe_stone',
 	recipe = {
 		{'group:stone', 'group:stone'},
-		{'default:stick', 'group:stone'},
-		{'default:stick', ''},
+		{'group:stick', 'group:stone'},
+		{'group:stick', ''},
 	}
 })
 
@@ -230,8 +230,8 @@ minetest.register_craft({
 	output = 'default:axe_steel',
 	recipe = {
 		{'default:steel_ingot', 'default:steel_ingot'},
-		{'default:stick', 'default:steel_ingot'},
-		{'default:stick', ''},
+		{'group:stick', 'default:steel_ingot'},
+		{'group:stick', ''},
 	}
 })
 
@@ -239,8 +239,8 @@ minetest.register_craft({
 	output = 'default:axe_bronze',
 	recipe = {
 		{'default:bronze_ingot', 'default:bronze_ingot'},
-		{'default:stick', 'default:bronze_ingot'},
-		{'default:stick', ''},
+		{'group:stick', 'default:bronze_ingot'},
+		{'group:stick', ''},
 	}
 })
 
@@ -248,8 +248,8 @@ minetest.register_craft({
 	output = 'default:axe_mese',
 	recipe = {
 		{'default:mese_crystal', 'default:mese_crystal'},
-		{'default:stick', 'default:mese_crystal'},
-		{'default:stick', ''},
+		{'group:stick', 'default:mese_crystal'},
+		{'group:stick', ''},
 	}
 })
 
@@ -257,8 +257,8 @@ minetest.register_craft({
 	output = 'default:axe_diamond',
 	recipe = {
 		{'default:diamond', 'default:diamond'},
-		{'default:stick', 'default:diamond'},
-		{'default:stick', ''},
+		{'group:stick', 'default:diamond'},
+		{'group:stick', ''},
 	}
 })