Add Gradle setup step to build workflow

Added Gradle setup step before the build process.

Author: link-fgfgui

.github/workflows/build.yml

@@ -16,6 +16,9 @@ jobs:
           java-version: 21
           distribution: 'temurin'
 
+      - name: setup gradle
+        uses: gradle/actions/setup-gradle@v3
+
       - name: build 
         run: |
           chmod +x ./gradlew
@@ -27,12 +30,11 @@ jobs:
           path: build/libs/*
           archive: false
 
-
       - name: publish
         if: startsWith(github.ref, 'refs/tags/')
         uses: apehum/mc-publish@v1.2
         with:
           modrinth-id: 7FoirOzn
           modrinth-token: ${{ secrets.MODRINTH_TOKEN }}
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          game-versions: 1.21.1
+          game-versions: 1.21.1