Ignore Scala 3.4.0 until it's announced

We're already seeing Scala Steward raise PRs for Scala 3.4.0, this might be unintentional?

guardian/play-secret-rotation#432

See also #2337 & #1104

Author: rtyley

modules/core/src/main/resources/default.scala-steward.conf

@@ -31,6 +31,9 @@ updates.ignore = [
   // Artifacts below are ignored because they are not yet announced.
 
   // Ignore the next Scala 3 version until it is announced.
+  { groupId = "org.scala-lang", artifactId = "scala3-compiler",     version = { exact = "3.4.0" } },
+  { groupId = "org.scala-lang", artifactId = "scala3-library",      version = { exact = "3.4.0" } },
+  { groupId = "org.scala-lang", artifactId = "scala3-library_sjs1", version = { exact = "3.4.0" } },
   { groupId = "org.scala-lang", artifactId = "scala3-compiler",     version = { exact = "3.3.2" } },
   { groupId = "org.scala-lang", artifactId = "scala3-library",      version = { exact = "3.3.2" } },
   { groupId = "org.scala-lang", artifactId = "scala3-library_sjs1", version = { exact = "3.3.2" } },