Update scala-library to 2.12.21

scala-steward · scala-steward · commit a247dc9d680e · 2025-12-12T17:25:25.000Z
diff --git a/build.sbt b/build.sbt
@@ -1,6 +1,6 @@
 import com.typesafe.tools.mima.core._
 
-val scala212 = "2.12.20"
+val scala212 = "2.12.21"
 val scala213 = "2.13.16"
 val scala3 = "3.3.6"
 
