Update GitHub Actions

Author: sideeffffect

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [ '8', '11', '17' ]
+        java: [ '8', '11', '17', '21' ]
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
@@ -18,8 +18,7 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.java }}
-      - name: Coursier cache
-        uses: coursier/cache-action@v6
+          cache: 'sbt'
       - name: sbt ci ${{ github.ref }}
         run: ./sbt ci
 

.github/workflows/release.yml

@@ -11,11 +11,11 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
-      - uses: olafurpg/setup-scala@v14
+      - uses: actions/setup-java@v4.0.0
         with:
-          java-version: adopt@1.8
-      - name: Coursier cache
-        uses: coursier/cache-action@v6
+          distribution: 'temurin'
+          java-version: 8
+          cache: 'sbt'
       - name: sbt ci-release ${{ github.ref }}
         run: ./sbt ci-release
         env: