Update cats-effect to 3.6.3

lucuma-steward[bot] · lucuma-steward[bot] · commit aba663362e14 · 2025-08-26T00:56:05.000Z
diff --git a/project/plugins.sbt b/project/plugins.sbt
@@ -1,4 +1,4 @@
 addSbtPlugin("edu.gemini" % "sbt-lucuma-lib" % "0.12.4")
 
-dependencyOverrides += "org.typelevel"          %% "cats-effect" % "2.5.5"
+dependencyOverrides += "org.typelevel"          %% "cats-effect" % "3.6.3"
 dependencyOverrides += "org.scala-lang.modules" %% "scala-xml"   % "2.4.0"
