Update fs2-core, fs2-io to 3.4.0 (#688)

Co-authored-by: Filippo Mariotti <[email protected]>

build.sbt

@@ -11,7 +11,7 @@ val V = new {
   val `cats-discipline`      = "1.5.1"
   val `discipline-munit`     = "1.0.9"
   val circe                  = "0.14.3"
-  val fs2                    = "3.3.0"
+  val fs2                    = "3.4.0"
   val jedis                  = "3.2.0"
   val `kind-projector`       = "0.13.2"
   val kittens                = "3.0.0"