Merge pull request #185 from scala-steward/update/scala3-library-3.7.3

Update scala3-library, scala3-staging to 3.7.3

Author: deanwampler

build.sbt

@@ -1,4 +1,4 @@
-val scala3 = "3.7.2"
+val scala3 = "3.7.3"
 lazy val root = project
   .in(file("."))
   .settings(