Please in step 5 the command it is correct?:$ sudo chcon -t admin_home_t file2.html or will be like the context of file1.html:$ sudo chcon -t httpd_sys_content_t file2.html
I did the exercise and you are right, it should be the httpd_sys_content_t context type.
Thanks for reporting it!
This has now been fixed in the working copy to be released in next version. Thanks!