Added LogEntry, Any, Dict, List, Optional, TypedDict imports (#20970)

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- [ ] **PR title**: "package: docs"

- [ ] **PR message**:
- **Description:** Uptaded docs: Rag streaming use-cases notebook with
LogEntry, Any, Dict, List, Optional, TypedDict imports
    - **Twitter handle:** c_nemri

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>

docs/docs/use_cases/question_answering/streaming.ipynb

@@ -346,7 +346,7 @@
     "from operator import itemgetter\n",
     "\n",
     "from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder\n",
-    "from langchain_core.tracers.log_stream import LogStreamCallbackHandler\n",
+    "from langchain_core.tracers.log_stream import LogEntry, LogStreamCallbackHandler\n",
     "\n",
     "contextualize_q_system_prompt = \"\"\"Given a chat history and the latest user question \\\n",
     "which might reference context in the chat history, formulate a standalone question \\\n",
@@ -400,6 +400,8 @@
     "To stream intermediate steps we'll use the `astream_log` method. This is an async method that yields JSONPatch ops that when applied in the same order as received build up the RunState:\n",
     "\n",
     "```python\n",
+    "from typing import Any, Dict, List, Optional, TypedDict\n",
+    "\n",
     "class RunState(TypedDict):\n",
     "    id: str\n",
     "    \"\"\"ID of the run.\"\"\"\n",