chore: update to v1.15.0 for release (#274)

Author: burkedavison

third_party/docfx-doclet-143274/pom.xml

@@ -6,7 +6,7 @@
 
   <groupId>com.microsoft</groupId>
   <artifactId>docfx-doclet</artifactId>
-  <version>1.14.0-SNAPSHOT</version>
+  <version>1.15.0-SNAPSHOT</version>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>