Change RunnableMap to RunnableParallel for consistency (#14142)

- **Description:** Change instances of RunnableMap to RunnableParallel,
as that should be the one used going forward. This makes it consistent
across the codebase.

templates/rag-google-cloud-sensitive-data-protection/rag_google_cloud_sensitive_data_protection/chain.py

@@ -7,7 +7,7 @@ from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain.pydantic_v1 import BaseModel, Field
 from langchain.schema.messages import AIMessage, HumanMessage
 from langchain.schema.output_parser import StrOutputParser
-from langchain.schema.runnable import RunnableLambda, RunnableMap
+from langchain.schema.runnable import RunnableLambda, RunnableParallel
 
 
 # Formatting for chat history
@@ -96,7 +96,7 @@ class ChatHistory(BaseModel):
     chat_history: List[Tuple[str, str]] = Field(..., extra={"widget": {"type": "chat"}})
 
 
-_inputs = RunnableMap(
+_inputs = RunnableParallel(
     {
         "question": RunnableLambda(
             lambda x: _deidentify_with_replace(