Update Story_Writing_with_Prompt_Chaining.ipynb (#169)

typo fix

examples/Story_Writing_with_Prompt_Chaining.ipynb

@@ -52,7 +52,7 @@
         "id": "NYMQCbLzVrU_"
       },
       "source": [
-        "This notebook demonstrates how to write a story using two  powerful: prompt chaining and iterative generation. These can be used to tackle complex tasks that are difficult or impossible to complete in a single step.\n",
+        "This notebook demonstrates how to write a story using two  powerful tools: prompt chaining and iterative generation. These can be used to tackle complex tasks that are difficult or impossible to complete in a single step.\n",
         "\n",
         "**Prompt chaining** involves breaking down a larger task into smaller, interconnected prompts. The output of each prompt then becomes the input for the next, guiding the language model through the process step-by-step. This approach offers several benefits:\n",
         "\n",