Clean up punctuation and link to website for About page

_pages/about.md

@@ -4,4 +4,4 @@ language: en
 permalink: /about/
 layout: page
 ---
-This is the official website of the United States of America used for providing information on the U.S. National Statistics for the U.N. Sustainable Development Goals. It was developed in collaboration with the US Office of Management and Budget, Office of Information and Regulatory Affairs: the US Department of State, Office of International Organizations; the US General Services Administration; and the US Office of Science and Technology Policy.
+This is the official website of the United States of America used for providing information on the U.S. National Statistics for the U.N. Sustainable Development Goals. It was developed in collaboration with the [Office of the Chief Statistician of the United States](https://www.statspolicy.gov/about/#office-chief), Office of Management and Budget; the U.S. Department of State, Office of International Organizations; the US General Services Administration; and the U.S. Office of Science and Technology Policy.