Merge pull request #2239 from scala-steward/update/cats-effect-3.6.0

Update cats-effect, cats-effect-testkit to 3.6.0

Author: jatcwang

build.sbt

@@ -4,7 +4,7 @@ import org.typelevel.sbt.tpolecat.{DevMode, CiMode}
 
 // Library versions all in one place, for convenience and sanity.
 lazy val catsVersion = "2.13.0"
-lazy val catsEffectVersion = "3.5.7"
+lazy val catsEffectVersion = "3.6.0"
 lazy val circeVersion = "0.14.12"
 lazy val fs2Version = "3.11.0"
 lazy val h2Version = "1.4.200"