update GH actions scripts

Author: UpcraftLP

.github/workflows/build.yml

@@ -15,27 +15,28 @@ jobs:
             17    # Minimum supported by Minecraft
         ]
         # and run on both Linux and Windows
-        os: [ubuntu-20.04, windows-latest]
+        os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
       - name: checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: validate gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/actions/wrapper-validation@v4
       - name: setup jdk ${{ matrix.java }}
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
+          cache: 'gradle'
       - name: make gradle wrapper executable
         if: ${{ runner.os != 'Windows' }}
         run: chmod +x ./gradlew
       - name: build
         run: ./gradlew build
       - name: capture build artifacts
         if: ${{ runner.os == 'Linux' && matrix.java == '17' }} # Only upload artifacts built from latest java on one OS
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: Artifacts
-          path: build/libs/
+          path: build/libs/