Update actions versions to fix deprecated warnings

.github/workflows/ci.yml

@@ -16,15 +16,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2 # clone the repository's code into the runner
+        uses: actions/checkout@v3 # clone the repository's code into the runner
 
       - name: Set up JDK 21
-        uses: actions/setup-java@v1 # Install and configure a specific version of the JDK.
+        uses: actions/setup-java@v3 # Install and configure a specific version of the JDK.
         with:
           java-version: '21'
 
       - name: Cache Maven packages
-        uses: actions/cache@v2 #  This uses the cache action to cache dependencies to speed up the workflow.
+        uses: actions/cache@v3 #  This uses the cache action to cache dependencies to speed up the workflow.
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}