Auto-upgrade to 6.18.0.1 (#360)

Co-authored-by: Auto-upgrade to 6.18.0.1 <[email protected]>

Author: daviddenton

gradle.properties

@@ -11,4 +11,4 @@ kotlin.incremental=true
 kotlinVersion=2.1.21
 junitVersion=5.10.3
 forkHandlesVersion=2.2.0.0
-http4kVersion=6.17.0.0
+http4kVersion=6.18.0.1