fix(main): correct background image path in root advancement

Adjust the background image path for the main advancement to ensure the colon separator
is correctly placed, changing from 'textures/blocks/' to 'textures/block/' as per the game'sresource naming convention. This tweak prevents potential issues with resource location
resolution in-game.
fix #92

src/generated/resources/data/avaritia/advancements/main/root.json

@@ -15,7 +15,7 @@
   },
   "display": {
     "announce_to_chat": false,
-    "background": "avaritia:textures/blocks/resource/neutron.png",
+    "background": "avaritia:textures/block/resource/neutron.png",
     "description": {
       "translate": "advancements.avaritia.diamond_lattice.desc"
     },