Update specs2-core, specs2-scalacheck to 4.23.0 (#1916)

Author: scala-steward

project/Versions.scala

@@ -35,7 +35,7 @@ object Versions {
   val ScapegoatVersion       = "1.4.11"
   val ShapelessVersion       = "2.3.13"
   val Slf4jVersion           = "2.0.17"
-  val Specs2Version          = "4.22.0"
+  val Specs2Version          = "4.23.0"
   val Stac4SVersion          = "0.8.1"
   val SttpClientVersion      = "2.3.0"
   val SttpShared             = "1.4.2"