fix: CI build faiss

Author: Seco1024

.github/workflows/ci.yml

@@ -17,14 +17,22 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.11'
+        python-version: '3.12'
 
     - name: Install build tools
       run: |
         sudo apt-get update
         sudo apt-get install -y g++ python3-dev
         pip install pybind11 pytest
 
+    - name: Build faiss (as submodule)
+      run: |
+        mkdir -p extern/faiss/build
+        cd extern/faiss/build
+        cmake .. -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DFAISS_ENABLE_PYTHON=OFF -DFAISS_ENABLE_TESTING=OFF -DCMAKE_INSTALL_PREFIX=$(pwd)/install
+        make -j$(nproc)
+        make install
+
     - name: Build pybind11 module
       run: make