Update README.md

Author: devernay

README.md

@@ -84,8 +84,8 @@ Here are the latest versions of Xcode that are known to /run/ on each OS X versi
 - [Xcode 5.1.1](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/xcode_5.1.1/xcode_5.1.1.dmg) on OS X 10.8 (Mountain Lion)
 - [Xcode 6.2](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_6.2/Xcode_6.2.dmg) on OS X 10.9 (Mavericks)
 - [Xcode 7.2.1](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_7.2.1/Xcode_7.2.1.dmg) on OS X 10.10 (Yosemite)
-- [Xcode 7.3.1](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_7.3.1/Xcode_7.3.1.dmg) on OS X 10.11 (El Capitan), please see note below.
-- [Xcode 8](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_8/Xcode_8.xip) on OS X 10.12 (Sierra), please see note below.
+- [Xcode 7.3.1](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_7.3.1/Xcode_7.3.1.dmg) on OS X 10.11 (El Capitan), please see note on linking below.
+- [Xcode 8.2.1](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_8.2.1/Xcode_8.2.1.xip) on OS X 10.12 (Sierra), please see note on linking below.
 
 More information about the compilers included in each version of Xcode can be found on the [MacPorts Wiki](https://trac.macports.org/wiki/XcodeVersionInfo).