Attempt to automate build: vibe coding the actions

.forgejo/workflows/on_release.yml

@@ -10,13 +10,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: https://source.mapcomplete.org/actions/checkout@v4
 
       - name: Set up JDK
-        uses: actions/setup-java@v3
-        with:
-          distribution: 'temurin'
-          java-version: '17'
+        run: sudo apt-get update && sudo apt-get install -y openjdk-17-jdk
 
       - name: Decode keystore
         run: |