upload artifact

.github/workflows/build.yml

@@ -4,10 +4,18 @@ jobs:
   Build-Server-Jar:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-java@v3
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Java
+        uses: actions/setup-java@v3
         with:
           distribution: temurin
           java-version: '8'
-      - run: .\gradlew.bat
-      - run: .\gradlew jar
+      - name: Run Gradle
+        run: .\gradlew.bat && .\gradlew jar
+      - name: Upload build
+        uses: actions/upload-artifact@v3
+        with:
+          name: Grasscutter
+          path: grasscutter.jar
+