Update scala-library to 2.12.20 (#204)

Author: scala-steward

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
       fail-fast: false
       matrix:
         java: ["8", "11", "17", "21"]
-        scala: ["2.12.19", "2.13.14", "3.5.0"]
+        scala: ["2.12.20", "2.13.14", "3.5.0"]
     steps:
       - name: Checkout current branch
         uses: actions/checkout@v4.1.7

build.sbt

@@ -2,7 +2,7 @@ import Dependencies._
 
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
-val Scala212: String = "2.12.19"
+val Scala212: String = "2.12.20"
 val Scala213: String = "2.13.14"
 val Scala3: String   = "3.5.0"