Update index.html for to make glorious HTML5 nation.

Phantom is now 100% forward-thinking HTML5 markup. This makes it better than those foolish HTML 4.1 saps. Rank even higher, and have an even cleaner, more semantically appropriate blog.

Plus, you can use way more H1 tags this way.
Merge pull request #2 from brichards/patch-1

Update index.html for to make glorious HTML5 nation.