fix(intro_to_ml): revert to prev. learning outcomes

7_ml/lesson_md/7.1_intro_to_ml.md

@@ -3,9 +3,9 @@
 
 Upon completion of this lesson, you will be able to:
 
-- Understanding Supervised and Unsupervised Learning.
-- Introduction to K-Nearest Neighbors (KNN)
-- You will understand the importance of evaluation metrics in assessing the performance of machine learning models.
+- Define Supervised and Unsupervised Learning.
+- Explain the concept and basic principles of K-Nearest Neighbors (KNN).
+- Discuss the role and significance of evaluation metrics in evaluating the performance of machine learning models.
 
 ### Introduction to Machine Learning