fix import path

Author: Pouyanpi

examples/configs/rag/custom_rag_output_rails/config.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from langchain_core.language_models.llms import BaseLLM
+from langchain_core.language_models import BaseLLM
 from langchain_core.output_parsers import StrOutputParser
 from langchain_core.prompts import PromptTemplate