Update build.yml

Author: scPointer

.github/workflows/build.yml

@@ -41,7 +41,7 @@ jobs:
           git clone https://github.com/LearningOS/rCore-Tutorial-Test-2025S.git ci-user/user
           ID=`git rev-parse --abbrev-ref HEAD | grep -oP 'ch\K[0-9]'`
           # cd ci-user && make test CHAPTER=$ID passwd=${{ secrets.BASE_TEST_TOKEN }}
-          cd ci-user && make test CHAPTER=$ID passwd=${{ secrets.BASE_TEST_TOKEN }} > ../output.txt
+          cd ci-user && make test CHAPTER=$ID passwd=${{ secrets.BASE_TEST_TOKEN }} OFFLINE=1 > ../output.txt
           cat ../output.txt
       - name: end
         id: end
@@ -86,4 +86,4 @@ jobs:
           build_dir: ./classroom
           keep_history: true
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}