chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/maven_tests.yml

@@ -39,7 +39,7 @@ jobs:
     steps:
       ## Checkout the current version of the code from the repo.
       - name: Checkout latest code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: "0"
 

.github/workflows/prepare_release_changelog.yml

@@ -15,7 +15,7 @@ jobs:
 
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.1.6
 
       # Setup Java 11 environment for the next steps
       - name: Setup Java