Polish "Add standardized property to distinguish a group of applications"

See gh-39957

spring-boot-project/spring-boot-docs/src/docs/antora/modules/how-to/pages/properties-and-configuration.adoc

@@ -204,7 +204,6 @@ The preceding example YAML corresponds to the following `application.properties`
 [source,properties,subs="verbatim",configprops]
 ----
 spring.application.name=cruncher
-spring.application.group=crunchGroup
 spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 spring.datasource.url=jdbc:mysql://localhost/test
 server.port=9000

spring-boot-project/spring-boot-docs/src/docs/antora/modules/reference/pages/actuator/tracing.adoc

@@ -88,10 +88,9 @@ logging:
   pattern:
     correlation: "[${spring.application.name:},%X{traceId:-},%X{spanId:-}] "
   include-application-name: false
-  include-application-group: false
 ----
 
-NOTE: In the example above, configprop:logging.include-application-name[] and configprop:logging.include-application-group[] is set to `false` to avoid the application name being duplicated in the log messages (configprop:logging.pattern.correlation[] already contains it).
+NOTE: In the example above, configprop:logging.include-application-name[] is set to `false` to avoid the application name being duplicated in the log messages (configprop:logging.pattern.correlation[] already contains it).
 It's also worth mentioning that configprop:logging.pattern.correlation[] contains a trailing space so that it is separated from the logger name that comes right after it by default.
 
 

spring-boot-project/spring-boot-docs/src/docs/antora/modules/reference/pages/features/logging.adoc

@@ -44,6 +44,7 @@ NOTE: Logback does not have a `FATAL` level.
 It is mapped to `ERROR`.
 
 TIP: If you have a configprop:spring.application.name[] property but don't want it logged you can set configprop:logging.include-application-name[] to `false`.
+
 TIP: If you have a configprop:spring.application.group[] property but don't want it logged you can set configprop:logging.include-application-group[] to `false`.