Fix "Integrating with Actuator" code snippet

Closes gh-36114

Author: mhalbritter

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

@@ -9,9 +9,9 @@ It also allows you to add an arbitrary number of additional properties, as shown
 include::../maven/build-info/pom.xml[tags=build-info]
 ----
 
-This configuration will generate a `build-info.properties` at the expected location with four additional keys.
+This configuration will generate a `build-info.properties` at the expected location with three additional keys.
 
-NOTE: `maven.compiler.source` and `maven.compiler.target` are expected to be regular properties available in the project.
-They will be interpolated as you would expect.
+NOTE: `java.version` is expected to be a regular property available in the project.
+It will be interpolated as you would expect.
 
 include::goals/build-info.adoc[leveloffset=+1]

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/docs/maven/build-info/pom.xml

@@ -17,8 +17,7 @@
 							<additionalProperties>
 								<encoding.source>UTF-8</encoding.source>
 								<encoding.reporting>UTF-8</encoding.reporting>
-								<java.source>${maven.compiler.source}</java.source>
-								<java.target>${maven.compiler.target}</java.target>
+								<java.version>${java.version}</java.version>
 							</additionalProperties>
 						</configuration>
 					</execution>