Update scala-library to 2.13.16

Author: scala-steward

build.sbt

@@ -3,7 +3,7 @@ import com.softwaremill.SbtSoftwareMillCommon.commonSmlBuildSettings
 import com.softwaremill.Publish.ossPublishSettings
 
 val scala2_12 = "2.12.20"
-val scala2_13 = "2.13.15"
+val scala2_13 = "2.13.16"
 val scala2 = List(scala2_12, scala2_13)
 val scala3 = List("3.3.4")