Update to scala 2.13.16

Author: bplommer

build.sbt

@@ -17,7 +17,7 @@ ThisBuild / tlSonatypeUseLegacyHost := false
 // publish website from this branch
 ThisBuild / tlSitePublishBranch := Some("main")
 
-val Scala213 = "2.13.14"
+val Scala213 = "2.13.16"
 ThisBuild / crossScalaVersions := Seq(Scala213, "3.3.3")
 ThisBuild / scalaVersion := Scala213 // the default Scala