Update Dockerfile py3.11 syntax

Dockerfile

@@ -23,9 +23,9 @@ RUN mkdir -p $SENTENCE_TRANSFORMERS_HOME && \
     chown -R user:user /home/user/.cache/huggingface
 
 # Download and persist the model properly (USE snapshot_download)
-RUN python -c "from huggingface_hub import snapshot_download; \
+RUN python -c "import os, shutil; \
+    from huggingface_hub import snapshot_download; \
     model_path = snapshot_download(repo_id='sentence-transformers/all-MiniLM-L6-v2', cache_dir='/app/model_cache'); \
-    import shutil, os; \
     snapshot_dir = os.path.join(model_path, 'snapshots', os.listdir(os.path.join(model_path, 'snapshots'))[0]); \
     for filename in os.listdir(snapshot_dir): \
         shutil.move(os.path.join(snapshot_dir, filename), '/app/model_cache/')"