Update GitHub Actions

Author: Noaaan

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: validate gradle wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: setup jdk ${{ matrix.java }}
@@ -32,7 +32,7 @@ jobs:
       - name: build
         run: ./gradlew build
       - name: capture build artifacts
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: Artifacts
           path: build/libs/