Update p2 links

[ci skip]
Signed-off-by: BJ Hargrave <bj@bjhargrave.com>

README.md

@@ -7,14 +7,13 @@ Please visit the [Bndtools Home Page](http://bndtools.org) for full documentatio
 Install using the Eclipse installer, using the following update site URL:
 
 ```
-http://bndtools-updates.s3.amazonaws.com/
+https://dl.bintray.com/bndtools/bndtools/latest/
 ```
 
 If you are feeling brave, install the latest alpha version from the following update site URLs instead:
 
 ```
 https://bndtools.ci.cloudbees.com/job/bndtools.master/lastSuccessfulBuild/artifact/build/generated/p2/
-https://bndtools.ci.cloudbees.com/job/bndtools.master/lastSuccessfulBuild/artifact/build/generated/extras/p2/
 ```
 
 ## License