revert the github workflow

Author: ShangkunLi

.github/workflows/main.yml

@@ -65,7 +65,7 @@ jobs:
       run: |
         mkdir -p ${{ env.CCACHE_DIR }}
         git --version
-        git clone --depth 1 --filter=blob:none --revision=${{ env.LLVM_COMMIT }} https://github.com/llvm/llvm-project.git
+        git clone --revision=${{ env.LLVM_COMMIT }} https://github.com/llvm/llvm-project.git
         cd llvm-project
         mkdir build && cd build
         cmake -G Ninja ../llvm \