Correct site publication with dedicated sbt action

Author: mcallisto

.github/workflows/site.yml

@@ -9,11 +9,14 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Setup JDK
+      - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
+          java-version: 17
           distribution: temurin
-          java-version: 11
+          cache: sbt
+      - name: Setup sbt
+        uses: sbt/setup-sbt@v1
       - name: Generate site
         run: sbt makeSite
       - name: Deploy to GitHub pages