Fix a minor bug for chatqna in docker-compose (#442) (#443)

Embedding and reranking services failed to run on GPU H100.
Change the image tag and use CPU for these services. This PR will
fix #442

Signed-off-by: PeterYang12 <yuhan.yang@intel.com>

ChatQnA/docker/gpu/docker_compose.yaml

@@ -27,7 +27,7 @@ services:
       REDIS_URL: ${REDIS_URL}
       INDEX_NAME: ${INDEX_NAME}
   tei-embedding-service:
-    image: ghcr.io/huggingface/text-embeddings-inference:1.2
+    image: ghcr.io/huggingface/text-embeddings-inference:cpu-1.2
     container_name: tei-embedding-server
     ports:
       - "8090:80"
@@ -83,7 +83,7 @@ services:
       LANGCHAIN_PROJECT: "opea-retriever-service"
     restart: unless-stopped
   tei-reranking-service:
-    image: ghcr.io/huggingface/text-embeddings-inference:1.2
+    image: ghcr.io/huggingface/text-embeddings-inference:cpu-1.2
     container_name: tei-reranking-server
     ports:
       - "8808:80"