Update Neo4j extension to use Spring Data Neo4j. (#125)

Move away from the Neo4j OGM usage because Spring Data Neo4j
fits better in the ecosystem, spring-batch is settled in.

Previously there was no visible difference to users because Spring Data Neo4j
was based on Neo4j OGM which isn't the case anymore.

.github/workflows/spring-batch-neo4j.yml

@@ -11,11 +11,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
-      - name: Set up JDK 1.8
-        uses: actions/setup-java@v1
+        uses: actions/checkout@v4
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
         with:
-          java-version: 1.8
+          distribution: 'temurin'
+          java-version: 17
       - name: Build with Maven
         run: mvn -B package --file pom.xml
         working-directory: spring-batch-neo4j