Update dataprep default mosec embedding model in config.py (#435)

Signed-off-by: Tian, Feng <feng.tian@intel.com>

comps/dataprep/milvus/config.py

@@ -12,7 +12,7 @@
 MILVUS_PORT = int(os.getenv("MILVUS_PORT", 19530))
 COLLECTION_NAME = os.getenv("COLLECTION_NAME", "rag_milvus")
 
-MOSEC_EMBEDDING_MODEL = "/root/bce-embedding-base_v1"
+MOSEC_EMBEDDING_MODEL = os.environ.get("MOSEC_EMBEDDING_MODEL", "/root/bce-embedding-base_v1")
 MOSEC_EMBEDDING_ENDPOINT = os.environ.get("MOSEC_EMBEDDING_ENDPOINT", "")
 os.environ["OPENAI_API_BASE"] = MOSEC_EMBEDDING_ENDPOINT
 os.environ["OPENAI_API_KEY"] = "Dummy key"