[CI] Update actions dependencies.

Author: mjpt777

.github/workflows/slow.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
       - name: Setup java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
           java-version: ${{ matrix.java }}
@@ -56,7 +56,7 @@ jobs:
       - name: Run property tests
         run: ./gradlew propertyTest
       - name: Upload test results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: success() || failure()
         with:
           name: property-tests