Update core_2.13 to 3.9.8 (#3098)

Author: scala-steward

project/deps.sc

@@ -227,7 +227,7 @@ object Deps {
       .exclude(("com.github.plokhotnyuk.jsoniter-scala", "jsoniter-scala-core_2.13"))
       .exclude(("org.scala-lang.modules", "scala-collection-compat_2.13"))
   def slf4jNop                  = ivy"org.slf4j:slf4j-nop:2.0.13"
-  def sttp                      = ivy"com.softwaremill.sttp.client3:core_2.13:3.9.7"
+  def sttp                      = ivy"com.softwaremill.sttp.client3:core_2.13:3.9.8"
   def svm                       = ivy"org.graalvm.nativeimage:svm:$graalVmVersion"
   def swoval                    = ivy"com.swoval:file-tree-views:2.1.12"
   def testInterface             = ivy"org.scala-sbt:test-interface:1.0"