Fix mixin json names

src/main/java/com/jaquadro/minecraft/storagedrawers/mixins/EarlyMixinsLoader.java

@@ -40,7 +40,7 @@ public class EarlyMixinsLoader implements IFMLLoadingPlugin, IEarlyMixinLoader {
         // rename the associated .json file by replacing the "mymodid" with your own mod ID
         // in the .json file edit the "package" and "refmap" properties to match your mod
         // also edit the "refmap" property in the "mixins.mymodid.json" file
-        return "mixins.storagedrawers.early.json";
+        return "mixins.StorageDrawers.early.json";
     }
 
     @Override

src/main/resources/mixins.StorageDrawers.early.json

@@ -2,7 +2,7 @@
   "required": true,
   "minVersion": "0.8.5-GTNH",
   "package": "com.jaquadro.minecraft.storagedrawers.mixins.early",
-  "refmap": "mixins.storagedrawers.refmap.json",
+  "refmap": "mixins.StorageDrawers.refmap.json",
   "target": "@env(DEFAULT)",
   "compatibilityLevel": "JAVA_8"
 }