Update cats-effect to 3.6.0 (#31)

Co-authored-by: horothesun-scala-steward[bot] <132169906+horothesun-scala-steward[bot]@users.noreply.github.com>

Author: horothesun-scala-steward[bot]

Main.scala

@@ -1,7 +1,7 @@
 //> using scala 3.6.4
 //> using jvm temurin:21
 
-//> using dep org.typelevel::cats-effect:3.5.7
+//> using dep org.typelevel::cats-effect:3.6.0
 //> using dep org.tpolecat::doobie-core:1.0.0-RC8
 //> using dep org.tpolecat::doobie-postgres:1.0.0-RC8