Update GH action versions

Author: malte0811

.github/workflows/build.yaml

@@ -6,13 +6,13 @@ jobs:
   run:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Set up JDK 21
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v5
         with:
           java-version: 21
           distribution: 'temurin'
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.gradle/caches
@@ -25,7 +25,7 @@ jobs:
       - name: Build
         run: ./gradlew build
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-artifacts
           path: |