Update zio, zio-json to 4.0.8 (#638)

Author: scala-steward

build.sbt

@@ -45,8 +45,8 @@ lazy val library =
     .settings(scalacOptions += "-language:higherKinds")
     .settings(
       libraryDependencies ++= List(
-        "com.softwaremill.sttp.client4" %% "zio"             % "4.0.7",
-        "com.softwaremill.sttp.client4" %% "zio-json"        % "4.0.7",
+        "com.softwaremill.sttp.client4" %% "zio"             % "4.0.8",
+        "com.softwaremill.sttp.client4" %% "zio-json"        % "4.0.8",
         "dev.zio"                       %% "zio-json"        % "0.7.43",
         "dev.zio"                       %% "zio-prelude"     % "1.0.0-RC40",
         "dev.zio"                       %% "zio-schema"      % "1.7.2",