V+

- Bump Iris from 4.3.0-26.2 to 4.3.1-26.2.
- Align Fabric, Forge, and NeoForge version defaults with the release.

gradle.properties

@@ -21,7 +21,7 @@ org.gradle.jvmargs=-Xmx3072m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF
 org.gradle.caching=true
 org.gradle.configureondemand=false
 
-irisVersion=4.3.0-26.2
+irisVersion=4.3.1-26.2
 minecraftVersion=26.3
 # Bukkit plugin api-version: lowest supported Minecraft release line so one artifact loads on 26.1.2 through 26.3
 apiVersion=26.1