fix refmap issues

platforms/forge/build.gradle.kts

@@ -20,7 +20,7 @@ apply(plugin = "net.minecraftforge.gradle")
 apply(plugin = "org.spongepowered.mixin")
 
 configure<org.spongepowered.asm.gradle.plugins.MixinExtension> {
-    add(sourceSets.main.get(), "terra.refmap.json")
+    add(sourceSets.main.get(), "terra-refmap.json")
 }
 
 plugins {

platforms/forge/src/main/resources/terra.mixins.json

@@ -2,7 +2,7 @@
   "required": true,
   "package": "com.dfsek.terra.forge.mixin",
   "compatibilityLevel": "JAVA_8",
-  "refmap": "terra.refmap.json",
+  "refmap": "terra-refmap.json",
   "mixins": [
   ],
   "client": [