Hotfix structure generation having the wrong tag (#10591)

Author: someaddons

src/main/resources/data/minecolonies/tags/worldgen/biome/has_structure/barbarian_camp.json

@@ -2,7 +2,7 @@
   "replace": false,
   "values": [
     "minecraft:plains",
-    "#forge:is_plains",
+    "#c:is_plains",
     "minecraft:sunflower_plains",
     "minecraft:snowy_plains",
     "minecraft:forest",

src/main/resources/data/minecolonies/tags/worldgen/biome/has_structure/desert_camp.json

@@ -1,6 +1,6 @@
 {
   "replace": false,
   "values": [
-    "#forge:is_desert"
+    "#c:is_desert"
   ]
 }

src/main/resources/data/minecolonies/tags/worldgen/biome/has_structure/desertoasis_colony.json

@@ -1,6 +1,6 @@
 {
   "replace": false,
   "values": [
-    "#forge:is_desert"
+    "#c:is_desert"
   ]
 }