Merge branch '2.4.x' into 2.5.x

Closes gh-26891

spring-boot-project/spring-boot-actuator-autoconfigure/src/docs/asciidoc/index.adoc

 [[spring-boot-actuator-web-api-documentation]]
 = Spring Boot Actuator Web API Documentation
 Andy Wilkinson, Stephane Nicoll
+v{gradle-project-version}
+:!version-label:
 :doctype: book
 :toc: left
 :toclevels: 4

spring-boot-project/spring-boot-docs/src/docs/asciidoc/attributes.adoc

+:!version-label:
 :doctype: book
 :idprefix:
 :idseparator: -

spring-boot-project/spring-boot-docs/src/docs/asciidoc/index.adoc

 [[index]]
 = Spring Boot Reference Documentation
 include::authors.adoc[]
+v{spring-boot-version}
 include::attributes.adoc[]
 
 
 
-*{spring-boot-version}*
-
 The reference documentation consists of the following sections:
 
 [horizontal]

spring-boot-project/spring-boot-docs/src/docs/asciidoc/index.singleadoc

 [[spring-boot-reference-documentation]]
 = Spring Boot Reference Documentation
 include::authors.adoc[]
+v{spring-boot-version}
 include::attributes.adoc[]
 
 
 
-*{spring-boot-version}*
-
 include::legal.adoc[leveloffset=+1]
 
 include::documentation.adoc[leveloffset=+1]

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/docs/asciidoc/index.adoc

 [[spring-boot-gradle-plugin-documentation]]
 = Spring Boot Gradle Plugin Reference Guide
 Andy Wilkinson, Scott Frederick
+v{gradle-project-version}
+:!version-label:
 :doctype: book
 :toc: left
 :toclevels: 4

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/docs/asciidoc/index.adoc

 [[spring-boot-maven-plugin-documentation]]
 = Spring Boot Maven Plugin Documentation
 Stephane Nicoll, Andy Wilkinson, Scott Frederick
+v{gradle-project-version}
+:!version-label:
 :doctype: book
 :toc: left
 :toclevels: 4