Fix ellipsis ‘…’ in subtitle of About page

There were one too few periods. And I use a horizontal ellipsis character instead of three periods. It’s the character ‘…’, XML-encoded because I don’t know if the site supports Unicode.

Link to About page: https://neocities.org/about
Merge pull request #5 from roryokane/fix-about-ellipsis

Fix ellipsis ‘…’ in subtitle of About page