Update app.py

updated data to including spring 2025

app.py

@@ -9,7 +9,7 @@ def greet(subject, course_number):
     subject = subject.upper()
 
     # import data as csv file
-    grades = pd.read_csv("gradedist.csv")
+    grades = pd.read_csv("gradedist2025.csv")
     grades = grades.rename(columns={'Course No.': 'Course_Number', 
                                     'Course Title': 'Course_Title',
                                     'Graded Enrollment': 'Enrollment',