Fix section of Windows service section

As the Windows service support is not related at all to the executable
jar support it needs to be in a separate location.

spring-boot-docs/src/main/asciidoc/deployment.adoc

@@ -497,7 +497,7 @@ configuration file named `/var/myapp/myapp.conf` if it exists.
 
 
 [[deployment-windows]]
-=== Microsoft Windows services
+== Microsoft Windows services
 Spring Boot application can be started as Windows service using
 https://github.com/kohsuke/winsw[`winsw`].