Update scala-library to 2.13.16

Author: ckipp01-scala-steward[bot]

build.sc

@@ -19,7 +19,7 @@ import io.kipp.mill.ci.release.SonatypeHost
 
 val millVersions = Seq("0.12.4", "0.11.12", "0.10.15")
 val millBinaryVersions = millVersions.map(scalaNativeBinaryVersion)
-val scala213 = "2.13.14"
+val scala213 = "2.13.16"
 val artifactBase = "mill-github-dependency-graph"
 
 def millBinaryVersion(millVersion: String) = scalaNativeBinaryVersion(

itest/src/cyclical/build.sc

@@ -8,7 +8,7 @@ import munit.Assertions._
 
 object overflow extends ScalaModule {
 
-  def scalaVersion = "2.13.14"
+  def scalaVersion = "2.13.16"
 
   // See https://github.com/ckipp01/mill-github-dependency-graph/issues/77 for the context
   // of this test. The main issue is that when you look at the children of this dep in coursier