hp-stage-modified: Add missing step in setup

Author: damithc

hands_on/stage_modified.py

@@ -30,4 +30,6 @@ def download(verbose: bool):
     run_command(["git", "init", "--initial-branch=main"], verbose)
     with open("fruits.txt", "w") as f:
         f.write("apples\nbananas\ncherries\n")
-    run_command(["git", "add", "fruits.txt"], verbose)
+    run_command(["git", "add", "fruits.txt"], verbose)
+    with open("fruits.txt", "a") as f:
+        f.write("dragon fruits\n")