GH-143 - CI build polish.

Author: odrotbohm

Diff for: .github/workflows/build.yml

@@ -13,10 +13,10 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up JDK 8
-      uses: actions/setup-java@v2
+      uses: actions/setup-java@v4
       with:
         distribution: 'temurin'
         java-version: 8