Require Minecraft 1.21.3 exactly and break with Sodium <0.6.0-beta.5

- Due to changes in 1.21.4, it is known that the code for Continuity 1.21.3 will definitely not work on 1.21.4.
- Sodium versions older than 0.6.0-beta.5 crash when an item is rendered through FRAPI.

src/main/resources/fabric.mod.json

@@ -31,10 +31,13 @@
   ],
 
   "depends": {
-    "minecraft": ">=1.21.3",
+    "minecraft": "1.21.3",
     "fabricloader": ">=0.15.0",
     "fabric-api": ">=0.100.1"
   },
+  "breaks": {
+    "sodium": "<0.6.0-beta.5"
+  },
 
   "custom": {
     "modmenu": {