Update leets-actions.yml

Author: ay-eonii

.github/workflows/leets-actions.yml

@@ -16,6 +16,7 @@ jobs:
   build-with-gradle:
     runs-on: ubuntu-20.04
     steps:
+    - uses: actions/checkout@v3
     - name: JDK 17 설치
       uses: actions/setup-java@v3
       with: