Update supported versions for 1.21.7 and 1.21.8

Author: johnpgr

src/main/resources/fabric.mod.json

@@ -31,7 +31,7 @@
   },
   "depends": {
     "fabricloader": ">=0.15.11",
-    "minecraft": ["1.21.6"],
+    "minecraft": ["1.21.6", "1.21.7", "1.21.8"],
     "fabric-language-kotlin": ">=1.11.0"
   },
   "suggests": {