Update scala3-library_sjs1_3 to 3.8.4

lucuma-steward[bot] · lucuma-steward[bot] · commit 829ef57b2964 · 2026-06-30T16:51:40.000Z
diff --git a/build.sbt b/build.sbt
@@ -1,6 +1,6 @@
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
-ThisBuild / crossScalaVersions := List("3.3.8")
+ThisBuild / crossScalaVersions := List("3.8.4")
 ThisBuild / tlBaseVersion      := "0.51"
 
 ThisBuild / tlCiReleaseBranches := Seq("master")
