Update client3:async-http-client-backend-cats, ... to 3.9.3 (#9)

Co-authored-by: scala-steward-didx[bot] <156918788+scala-steward-didx[bot]@users.noreply.github.com>

build.sbt

@@ -35,7 +35,7 @@ lazy val munitCEVersion     = "2.0.0-M4"
 lazy val pureconfigVersion  = "0.17.5"
 lazy val scalaTestVersion   = "3.2.18"
 lazy val slf4jVersion       = "2.0.12"
-lazy val sttpVersion        = "3.9.2"
+lazy val sttpVersion        = "3.9.3"
 lazy val tapirVersion       = "1.9.1"
 
 lazy val commonSettings   = Seq(