Update tunnel bores not_rail_solid block tag to use #minecraft:chains (#1265)

Author: runcows

gm4_tunnel_bores/data/gm4_tunnel_bores/tags/block/not_rail_solid.json

@@ -143,8 +143,8 @@
     "minecraft:crimson_roots",
     "minecraft:warped_roots",
     "minecraft:nether_sprouts",
+    { "id": "#minecraft:chains", "required": false },
     { "id": "minecraft:chain", "required": false },
-    { "id": "minecraft:iron_chain", "required": false },
     "minecraft:warped_fence",
     "minecraft:crimson_fence_gate",
     "minecraft:sweet_berry_bush",