Revert mistake in labels

Author: dsyer

spring-grpc-docs/src/main/antora/modules/ROOT/pages/whats-new.adoc

@@ -2,8 +2,8 @@
 
 :page-section-summary-toc: 1
 
-[[what-s-new-in-0.10.0-SNAPSHOT-since-0-8-0]]
-== What's New in 0.10.0-SNAPSHOT Since 0.8.0
+[[what-s-new-in-0.9.0-since-0-8-0]]
+== What's New in 0.9.0 Since 0.8.0
 
 This section covers the changes made from version 0.8.0 to version 0.10.0-SNAPSHOT.