fix typo

app.py

@@ -45,7 +45,7 @@ click any of these examples to issue the corresponding query to the AI.
 **Feedback**: Feedback is welcomed, encouraged, and invaluable! To give feedback in regards to one of the model's responses, click the **Give Feedback on Last Response** button just below
 the user input bar. This allows you to provide either positive or negative feedback in regards to the model's most recent response. A **Feedback Form** will appear above the model's title. 
 Please be sure to select either 👍 or 👎 before adding additional notes about your choice. Be as brief or as detailed as you like! Note that you are making a difference; this 
-feedback allows us to later improve this model for your usage through a training technique known as reinforced learning through human feedback. \n
+feedback allows us to later improve this model for your usage through a training technique known as reinforcement learning through human feedback. \n
 
 **Disclaimer**: The model has **no access to PHI**. \n