Update fs2-core, fs2-io to 3.12.1

Author: typelevel-steward[bot]

build.sbt

@@ -8,7 +8,7 @@ val catsEffectVersion      = "3.6.3"
 val circeVersion           = "0.14.8"
 val disciplineMunitVersion = "2.0.0-M3"
 val doobieVersion          = "1.0.0-RC10"
-val fs2Version             = "3.12.0"
+val fs2Version             = "3.12.1"
 val http4sVersion          = "0.23.30"
 val kindProjectorVersion   = "0.13.3"
 val literallyVersion       = "1.1.0"