Update scala3-library, ... to 3.6.3 (#297)

Author: scala-steward

build.sbt

@@ -2,7 +2,7 @@ val scalapbVersion = "0.11.17"
 
 val Scala212 = "2.12.20"
 val Scala213 = "2.13.15"
-val Scala3 = "3.6.2"
+val Scala3 = "3.6.3"
 
 ThisBuild / crossScalaVersions := Seq(Scala212, Scala213, Scala3)