upgrading actions to v4 to avoid CI/CD warnings

.github/workflows/maven.yml

@@ -14,15 +14,16 @@ jobs:
 
     steps:
       - name: Checkout...
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up JDK...
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
+          distribution: 'temurin'
 
       - name: Retrieve mvn repo cache...
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}-build-v1
@@ -37,21 +38,22 @@ jobs:
 
     steps:
       - name: Checkout...
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       # this action exports env.POM_VERSION variable
       - name: Export Maven coordinates...
         uses: bootique-tools/export-maven-coordinates-action@v1
 
       - name: Set up JDK...
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         # skip this for the release versions
         if: contains(env.POM_VERSION, '-SNAPSHOT')
         with:
           java-version: 11
+          distribution: 'temurin'
 
       - name: Retrieve mvn repo cache...
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         # skip this for the release versions
         if: contains(env.POM_VERSION, '-SNAPSHOT')
         with: