Update workflow version

Author: jellejurre

.github/workflows/maven.yml

@@ -19,9 +19,9 @@ jobs:
       matrix:
         java: [ '8' ]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up JDK
-      uses: actions/setup-java@v2
+      uses: actions/setup-java@v3
       with:
         java-version: ${{ matrix.java }}
         distribution: 'temurin'