Update scala 2.12 to 2.12.16 in docs

modules/directives/src/main/scala/scala/build/preprocessing/directives/UsingScalaVersionDirectiveHandler.scala

@@ -16,7 +16,7 @@ case object UsingScalaVersionDirectiveHandler extends UsingDirectiveHandler {
     "//> using scala \"3.0.2\"",
     "//> using scala \"2.13\"",
     "//> using scala \"2\"",
-    "//> using scala \"2.13.6\", \"2.12.15\""
+    "//> using scala \"2.13.6\", \"2.12.16\""
   )
 
   def keys = Seq("scala")

website/docs/commands/compile.md

@@ -214,7 +214,7 @@ scala-cli -S 2.13.8 --scalac-help
 
 Other scalac print help options (like `-X`, `-Xshow-phases`, `-Vphases`, etc.) are supported as well.
 ```bash
-scala-cli -S 2.12.15 -Xshow-phases
+scala-cli -S 2.12.16 -Xshow-phases
 #
 #    phase name  id  description
 #    ----------  --  -----------

website/docs/cookbooks/scala-versions.md

@@ -75,11 +75,11 @@ and this:
 scala-cli -S 2.12 ScalaVersion.scala
 ```
 <!-- Expected-regex:
-Scala: 2\.12\.15
+Scala: 2\.12\.16
 -->
 
 In the first example (`-S 2`), the application picks up the latest Scala 2 stable release (`2.13.7` at the time of this writing).
-In the second example, the application picks up the latest stable release of `2.12` (which is `2.12.15` at the time of this writing).
+In the second example, the application picks up the latest stable release of `2.12` (which is `2.12.16` at the time of this writing).
 
 You can also pin the version of the language within a `.scala` file with `using` directives.
 
@@ -103,10 +103,10 @@ scala-cli ScalaVersion.scala version.scala
 ```
 
 <!-- Expected-regex:
-Scala: 2\.12\.15
+Scala: 2\.12\.16
 -->
 
-The output at the time of this writing is "`2.12.15`".
+The output at the time of this writing is "`2.12.16`".
 
 The `scala-cli` philosophy is “command line first,” so any configuration information that’s passed to the command line will override `using` directives. So when you run this command with the `-S` option:
 

website/docs/reference/directives.md

@@ -179,7 +179,7 @@ Set the default Scala version
 
 `//> using scala "2"`
 
-`//> using scala "2.13.6", "2.12.15"`
+`//> using scala "2.13.6", "2.12.16"`
 
 ### Scala.js options