Fix some item predicates in guidebook unlocks (Gamemode4Dev#1080)

Author: misode

gm4_double_doors/data/gm4_double_doors/guidebook/double_doors.json

@@ -11,7 +11,7 @@
       "conditions": {
         "items": [
           {
-            "tag": "minecraft:doors"
+            "items": "#minecraft:doors"
           }
         ]
       }

gm4_podzol_rooting_soil/data/gm4_podzol_rooting_soil/guidebook/podzol_rooting_soil.json

@@ -11,7 +11,7 @@
       "conditions": {
         "items": [
           {
-            "tag": "minecraft:saplings"
+            "items": "#minecraft:saplings"
           }
         ]
       }

gm4_standard_crafting/data/gm4_standard_crafting/guidebook/standard_crafting.json

@@ -119,7 +119,7 @@
       "conditions": {
         "items": [
           {
-            "tag": "minecraft:wool"
+            "items": "#minecraft:wool"
           }
         ]
       }

gm4_sweethearts/data/gm4_sweethearts/guidebook/sweethearts.json

@@ -11,7 +11,7 @@
       "conditions": {
         "items": [
           {
-            "tag": "minecraft:small_flowers"
+            "items": "#minecraft:small_flowers"
           }
         ]
       }