You need to define an anchor in your markup (next to the "About" heading):
<a name="about"></a>
EDIT:
Because of the discussion, snarky downvotes (BTW - I supported Richard Jordan) and my own edification; anyone else who has a question about this should investigate the use of the ID attribute for the actual element to which they want to bind:
<h1 id="about>About</h1>
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