ci: update build.yml

Author: OptiJava

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
       - name: checkout repository
         uses: actions/checkout@v4
       - name: validate gradle wrapper
-        uses: gradle/wrapper-validation-action@v3
+        uses: gradle/actions/wrapper-validation@v4
       - name: setup jdk ${{ matrix.java }}
         uses: actions/setup-java@v4
         with:
@@ -39,7 +39,7 @@ jobs:
           mkdir out
           bash ./.github/scripts/build_output.sh
       - name: capture build artifacts
-        if: ${{ runner.os == 'Linux' && matrix.java == '17' }}
+        if: ${{ runner.os == 'Linux' && matrix.java == '21' }}
         uses: actions/upload-artifact@v4
         with:
           name: artifacts