tru -> actual in classfcn1

Author: trevorcampbell

source/classification1.md

@@ -983,7 +983,7 @@ new_obs = pd.DataFrame({"Perimeter": [0], "Concavity": [3.5]})
 knn.predict(new_obs)
 ```
 
-Is this predicted malignant label the true class for this observation? 
+Is this predicted malignant label the actual class for this observation?
 Well, we don't know because we do not have this
 observation's diagnosis— that is what we were trying to predict! The 
 classifier's prediction is not necessarily correct, but in the next chapter, we will