CI: Checkout submodules

Change-Id: Id991321d1ab581cbffabddafe9948f0c60b10588

Author: XayahSuSuSu

.github/workflows/bin.yaml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
 
       - name: Build
         run: bash -e -x build/build_bin.sh all all 1> /dev/null