Update Github workflow (#629)

.github/workflows/gradle.yml

@@ -9,13 +9,13 @@ jobs:
     runs-on: ubuntu-latest
     if: "!contains(github.event.commits[0].message, '[ci-skip]')"
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.0.0
     - uses: gradle/wrapper-validation-action@v1
-    - name: Set up JDK 16
-      uses: actions/setup-java@v2
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3.0.0
       with:
         distribution: temurin
-        java-version: 16
+        java-version: 17
         cache: gradle
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
@@ -24,7 +24,8 @@ jobs:
     - name: Build with Gradle
       run: ./gradlew build
     - name: Upload artifacts
-      uses: "actions/upload-artifact@v2.2.3"
+      uses: "actions/upload-artifact@v3.0.0"
       with:
         name: "IridiumSkyblock"
         path: "build/libs/IridiumSkyblock-*.jar"
+        retention-days: 90