Update github actions (#18)

Author: hduelme

.github/workflows/main.yml

@@ -9,11 +9,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [1.8, 11, 13, 17, 18-ea, 19-ea]
+        java: [8, 11, 13, 17, 18, 19]
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
+          distribution: 'zulu'
           java-version: ${{ matrix.java }}
       - name: Verify
         run: ./mvnw verify -B --no-transfer-progress -V