textures: add amethyst block, raw iron, raw gold

overviewer_core/src/mc_id.h

@@ -312,6 +312,11 @@ enum mc_block_id {
     block_soul_torch = 1039,
     block_soul_fire = 1040,
 
+    // 1.17
+    block_amethyst = 1042,
+    block_raw_iron = 1043,
+    block_raw_gold = 1044,
+
     // adding a gap in the numbering of walls to keep them all
     // in one numbering block starting at 1792
     // all blocks between 1792 and 2047 are considered walls