update nuspec, release notes

BeckmanComms.Api.DataTransferObjects/BeckmanComms.Api.DataTransferObjects.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
   <metadata>
     <id>BeckmanComms.Api.DataTransferObjects</id>
-    <version>2.0.0-alpha08</version>
+    <version>2.0.0-alpha09</version>
     <title>Beckman API Data Transfer Objects</title>
     <authors>areynold</authors>
     <owners>Beckman Institute; University of Illinois</owners>
@@ -11,7 +11,7 @@
     <description>Model classes for use with the Beckman Institute web API.</description>
     <summary>Model classes for use with the Beckman Institute web API.</summary>
     <releaseNotes>
-      unreleased:
+      2.0.0-alpha09:
       * Add nullable EventDto recurrence ID.
       * Make EventDto.EndDate nullable.