Merge pull request #6890 from OpenLiberty/staging-nav

add springboot topics to staging nav

modules/ROOT/nav.adoc

@@ -97,6 +97,9 @@
 * xref:instanton.adoc[Faster startup with InstantOn]
   ** xref:instanton-sycalls-json.adoc[InstantOn system calls]
   ** xref:instanton-limitations.adoc[InstantOn limitations and known issues]
+* xref:deploy-spring-boot.adoc[Configure and Deploy Spring Boot applications]
+  ** xref:configure-spring-boot-actuator.adoc[Configuring non-default settings for the Spring Boot Actuator]
+  ** https://openliberty.io/guides/spring-boot.html[Guide: Containerizing, packaging, and running a Spring Boot application]
 * xref:runnable-jar-files.adoc[Runnable JAR files]
 * xref:class-loader-library-config.adoc[Class loader configuration]
 * xref:virtual-hosts.adoc[Virtual hosts]