Update stac4s:core, stac4s:testing to 0.9.1

Author: scala-steward

project/Versions.scala

@@ -36,7 +36,7 @@ object Versions {
   val ShapelessVersion       = "2.3.9"
   val Slf4jVersion           = "2.0.13"
   val Specs2Version          = "4.20.6"
-  val Stac4SVersion          = "0.8.1"
+  val Stac4SVersion          = "0.9.1"
   val SttpClientVersion      = "2.3.0"
   val SttpShared             = "1.3.18"
   val SttpModelVersion       = "1.4.26"