Update atomicfu version to 0.30.0-beta (#4549)

Author: murfel

gradle.properties

@@ -5,7 +5,7 @@ group=org.jetbrains.kotlinx
 # ONLY rename these properties alongside adapting kotlinx.train build chain
 # and the `firstPartyDependencies` list in `buildSrc`.
 kotlin_version=2.2.20
-atomicfu_version=0.26.1
+atomicfu_version=0.30.0-beta
 
 # Dependencies
 benchmarks_version=0.4.13