Merge pull request #1102 from anoukvlug/text_edit

Update 06-ignore.md (minor edit)

Author: erinmgraham

episodes/06-ignore.md

@@ -130,7 +130,7 @@ Use -f if you really want to add them.
 
 If we really want to override our ignore settings,
 we can use `git add -f` to force Git to add something. For example,
-`git add -f a.csv`.
+`git add -f a.png`.
 We can also always see the status of ignored files if we want:
 
 ```bash