Update updates.ignore for 0.25.x

Author: rossabaker

.scala-steward.conf

@@ -9,6 +9,7 @@ updates.ignore = [
   { groupId = "org.http4s", artifactId = "http4s-server" },
   { groupId = "org.http4s", artifactId = "http4s-scalafix-internal" },
   { groupId = "org.http4s", artifactId = "sbt-http4s-org" },
+  { groupId = "org.scala-lang", artifactId = "scala-library" },
   { groupId = "org.scala-lang", artifactId = "scala3-library" },
   { groupId = "org.scala-sbt", artifactId = "sbt" },
   { groupId = "org.scalameta", artifactId = "scalafmt-core" }