Refa: docker/.env comment refinement. (#6689)

### What problem does this PR solve?


### Type of change

- [x] Refactoring

docker/.env

@@ -86,22 +86,10 @@ RAGFLOW_IMAGE=infiniflow/ragflow:v0.17.2-slim
 # To download the RAGFlow Docker image with embedding models, uncomment the following line instead:
 # RAGFLOW_IMAGE=infiniflow/ragflow:v0.17.2
 # 
-# The Docker image of the v0.17.2 edition includes:
-# - Built-in embedding models:
+# The Docker image of the v0.17.2 edition includes built-in embedding models:
 #   - BAAI/bge-large-zh-v1.5
-#   - BAAI/bge-reranker-v2-m3
 #   - maidalun1020/bce-embedding-base_v1
-#   - maidalun1020/bce-reranker-base_v1
-# - Embedding models that will be downloaded once you select them in the RAGFlow UI:
-#   - BAAI/bge-base-en-v1.5
-#   - BAAI/bge-large-en-v1.5
-#   - BAAI/bge-small-en-v1.5
-#   - BAAI/bge-small-zh-v1.5
-#   - jinaai/jina-embeddings-v2-base-en
-#   - jinaai/jina-embeddings-v2-small-en
-#   - nomic-ai/nomic-embed-text-v1.5
-#   - sentence-transformers/all-MiniLM-L6-v2
-#
+
 #