Revert "fixing typo"

This reverts commit 46d3eda.

Revert back to before fixin typo

Author: krismaadiwibawa

compound_interest.py

@@ -17,7 +17,7 @@ def compound_interest(p, t, r):
 
 
 if __name__ == "__main__":
-    p = float(input("Enter the principal amount: "))
+    p = float(input("Enter the principle amount: "))
     t = float(input("Enter the time period: "))
     r = float(input("Enter the rate of interest: "))