fix: Fix rag_embedding_model_config logic indentation

PiperOrigin-RevId: 729297681

Author: yinghsienwu

vertexai/rag/utils/_gapic_utils.py

@@ -565,7 +565,7 @@ def set_backend_config(
  "backend_config must be a VertexFeatureStore,"
  "RagManagedDb, or Pinecone."
  )
-  if backend_config.rag_embedding_model_config:
-  set_embedding_model_config(
-  backend_config.rag_embedding_model_config, rag_corpus
-  )
+ if backend_config.rag_embedding_model_config:
+ set_embedding_model_config(
+ backend_config.rag_embedding_model_config, rag_corpus
+ )