Clarify that data is not used for training ML/AI models

Author: nwalters512

src/pages/legal/privacy.mdx

@@ -71,6 +71,7 @@ For certain Canadian universities, all personal information collected by or thro
 
 - PrairieLearn does not and will not sell your Personal Information in connection with your use of the Service.
 - PrairieLearn does not and will not use any of your Personal Information to engage in targeted marketing.
+- PrairieLearn does not and will not use your Personal Information or User Content to train machine learning or artificial intelligence models. While PrairieLearn may use generative AI features to enhance the Service, your data remains yours and is never used as training data for AI models.
 
 ## Security of your Personal Information