Update actions in CI workflow.

Author: odrotbohm

Diff for: .github/workflows/build.yml

@@ -14,10 +14,10 @@ jobs:
     steps:
 
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Set up JDK 17
-      uses: actions/setup-java@v2
+      uses: actions/setup-java@v4
       with:
         distribution: 'temurin'
         java-version: 17
@@ -33,10 +33,10 @@ jobs:
 
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Set up JDK 17
-      uses: actions/setup-java@v2
+      uses: actions/setup-java@v4
       with:
         distribution: 'temurin'
         java-version: 17