[build] Update scala-library, scala-reflect to 2.12.21

scala-steward · scala-steward · commit 688a3f6bd02a · 2025-12-12T21:28:33.000Z
diff --git a/build.sbt b/build.sbt
@@ -1,4 +1,4 @@
-val scala212Ver = "2.12.20"
+val scala212Ver = "2.12.21"
 val scala213Ver = "2.13.18"
 val scala3Ver = "3.3.7"
 
