Update index.html

Co-authored-by: Ted Thibodeau Jr <tthibodeau@openlinksw.com>

index.html

@@ -91,7 +91,7 @@ <h1>Basic Example</h1>
  ],
  <span class='comment'>// specify the identifier for the presentation</span>
  "id": "http://example.edu/presentations/1872",
- <span class='comment'>// the presentation type, which declare what data to expect in the presentation</span>
+ <span class='comment'>// the presentation type, which declares what data to expect in the presentation</span>
  "type": "VerifiablePresentation",
  <span class='comment'>// when the presentation was issued</span>
  "validFrom": "2010-01-01T19:23:24Z",