Point release notes at github.

Author: damianh

src/LibLog/LibLog.nuspec

@@ -22,7 +22,7 @@ This package is a variation of option 3 but will automatically wire things up to
 - Using optimized reflection, it transparently supports NLog, Log4Net, Serilog and Loupe without any wiring up required by an end user, if the end user simply has a reference to any of these logging frameworks.</description>
         <summary>A source code package designed primarily for library and framework authors who want dependency free logging support in their component. Also useful in end applications. Works with .NET 4 and portable-net45+win+wpa81+MonoAndroid10+MonoTouch10 and higher.</summary>
         <copyright>Damian Hickey and Contributors 2011-2018</copyright>
-        <releaseNotes>Support for NetStandard2.0 and NET452. Only works with .NET SDK project formats.</releaseNotes>
+        <releaseNotes>See https://github.com/damianh/LibLog/releases for release notes.</releaseNotes>
         <tags>logging, framework, component, nlog, log4net, entlib, serilog, loupe, pcl</tags>
         <contentFiles>
             <files include="*.cs.pp" />