fix name

2019/2019-09-09_testCourseAdv/slides/rebase-iPresentation1.md

@@ -4,9 +4,9 @@
 * Add and commit two files to this branch:  
 
 ```bash
-$ echo "# Micheal" > Micheal.md
-$ git add Micheal.md
-$ git commit -m "Add Micheal to the list of attendees"
+$ echo "# Michael" > Michael.md
+$ git add Michael.md
+$ git commit -m "Add Michael to the list of attendees"
 $ git push origin yourBranch
 
 $ echo "# Kevin" > Kevin.md