RFR (JAXP) 8139585: Typo: "APIi" instead of "API"

[Mandy Chung]

> On May 19, 2016, at 3:35 PM, huizhe wang <huizhe.wang at oracle.com> wrote:
> 
> Hi,
> 
> Replaced the texts with the titles of the documents they are referring to.
> 
> JBS: https://bugs.openjdk.java.net/browse/JDK-8139585
> Webrev: http://cr.openjdk.java.net/~joehw/jdk9/8139585/webrev/

+1

Mandy