[build] Update scala-library, scala-reflect to 2.13.16

Author: scala-steward

build.sbt

@@ -1,5 +1,5 @@
 val scala212Ver = "2.12.20"
-val scala213Ver = "2.13.15"
+val scala213Ver = "2.13.16"
 val scala3Ver = "3.3.4"
 
 val githubId = "rayrobdod/string-context-parser-combinator"