Fix JINA api embeddings error #43

NFO:httpx:HTTP Request: POST https://api.jina.ai/v1/embeddings "HTTP/1.1 400 Bad Request"
ERROR:server.embeddings.jina_api:Jina API error 400: {"detail":{"message":"Failed to encode text","request_id":"ce1937fe3ffa0661a71608f3585b401a"}}