Update GitHub workflow

Author: mschae23

.github/workflows/build.yml

@@ -8,30 +8,23 @@ on: [pull_request, push]
 
 jobs:
   build:
-    strategy:
-      matrix:
-        # Use these Java versions
-        java: [
-          21,    # Current Java LTS
-        ]
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - name: checkout repository
         uses: actions/checkout@v4
       - name: validate gradle wrapper
-        uses: gradle/wrapper-validation-action@v2
-      - name: setup jdk ${{ matrix.java }}
+        uses: gradle/actions/wrapper-validation@v4
+      - name: setup jdk
         uses: actions/setup-java@v4
         with:
-          java-version: ${{ matrix.java }}
+          java-version: '21'
           distribution: 'microsoft'
       - name: make gradle wrapper executable
         run: chmod +x ./gradlew
       - name: build
         run: ./gradlew build
       - name: capture build artifacts
-        if: ${{ matrix.java == '21' }} # Only upload artifacts built from latest java
         uses: actions/upload-artifact@v4
         with:
           name: Artifacts
-          path: build/libs/
+          path: build/libs/