Update async-http-client to 2.15.0 in series/0.24

Author: http4s-steward[bot]

build.sbt

@@ -21,7 +21,7 @@ ThisBuild / startYear := Some(2013)
 
 lazy val root = tlCrossRootProject.aggregate(servlet, examples)
 
-val asyncHttpClientVersion = "2.14.5"
+val asyncHttpClientVersion = "2.15.0"
 val jettyVersion = "12.0.35"
 val http4sVersion = "0.23.34"
 val munitCatsEffectVersion = "2.2.0"