Update immutables to 2.10.1

Author: Virtlink

core/spoofax.depconstraints/build.gradle.kts

@@ -19,7 +19,7 @@ val checkerframeworkVersion = "3.16.0"
 
 val daggerVersion = "2.36" // Do not upgrade, causes Gradle/Kotlin compatibility issues due to upgrade to Kotlin 1.5.
 val derive4jVersion = "1.1.1"
-val immutablesVersion = "2.8.2"
+val immutablesVersion = "2.10.1"
 
 val yamlVersion = "1.26"