Update scala-library, scala-reflect to 2.12.20 (#148)

* Update scala-library, scala-reflect to 2.12.20

* Regenerate GitHub Actions workflow

Executed command: sbt githubWorkflowGenerate

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.3.3, 2.13.14, 2.12.19]
+        scala: [3.3.3, 2.13.14, 2.12.20]
         java: [temurin@11]
     runs-on: ${{ matrix.os }}
     steps:
@@ -105,12 +105,12 @@ jobs:
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.12.19)
+      - name: Download target directories (2.12.20)
         uses: actions/download-artifact@v4
         with:
-          name: target-${{ matrix.os }}-2.12.19-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.12.20-${{ matrix.java }}
 
-      - name: Inflate target directories (2.12.19)
+      - name: Inflate target directories (2.12.20)
         run: |
           tar xf targets.tar
           rm targets.tar

build.sbt

@@ -8,7 +8,7 @@ name := "unindent"
 
 ThisBuild / scalaVersion := "3.3.3"
 
-ThisBuild / crossScalaVersions := Seq("3.3.3", "2.13.14", "2.12.19")
+ThisBuild / crossScalaVersions := Seq("3.3.3", "2.13.14", "2.12.20")
 
 ThisBuild / scalacOptions ++= {
   CrossVersion.partialVersion(scalaVersion.value) match {