docs: update few documentation issues

documentation/spring-boot-docs/src/docs/antora/modules/how-to/pages/deployment/cloud.adoc

@@ -24,7 +24,7 @@ In this section, we look at what it takes to get the xref:tutorial:first-applica
 Support for xref:how-to:webserver.adoc#howto.webserver.use-behind-a-proxy-server[forwarded headers] should only be enabled when the application receives traffic from a trusted HTTP proxy, and is only directly accessible from a trusted network.
 When running on a cloud platform, forward headers are enabled automatically.
 This builds on the assumption that the platform will ensure that individual application instances will only be directly accessible from a trusted network.
-If that is not the case for your specific platform, set `spring.forward-headers-strategy` to `none`.
+If that is not the case for your specific platform, set `server.forward-headers-strategy` to `none`.
 
 
 [[howto.deployment.cloud.cloud-foundry]]

documentation/spring-boot-docs/src/docs/antora/modules/reference/pages/data/sql.adoc

@@ -274,7 +274,7 @@ include-code::CityRepository[]
 
 Spring Data JPA repositories support three different modes of bootstrapping: default, deferred, and lazy.
 To enable deferred or lazy bootstrapping, set the configprop:spring.data.jpa.repositories.bootstrap-mode[] property to `deferred` or `lazy` respectively.
-When using deferred or lazy bootstrapping, the auto-configured javadoc:org.springframework.boot.jpa.EntityManagerFactoryBuilder[] will use the context's javadoc:org.springframework.core.task.AsyncTaskExecutor[], if any, as the bootstrap executor.
+When using deferred bootstrapping, the auto-configured javadoc:org.springframework.boot.jpa.EntityManagerFactoryBuilder[] requires a bootstrap executor and will use the context's javadoc:org.springframework.core.task.AsyncTaskExecutor[], if one can be determined.
 If more than one exists, the one named `applicationTaskExecutor` will be used.
 
 [NOTE]

documentation/spring-boot-docs/src/docs/antora/modules/reference/pages/features/external-config.adoc

@@ -874,7 +874,7 @@ This will happen automatically if you use Spring Boot's Gradle plugin or if you
 
 NOTE: The use of javadoc:java.util.Optional[] with javadoc:org.springframework.boot.context.properties.ConfigurationProperties[format=annotation] is not recommended as it is primarily intended for use as a return type.
 As such, it is not well-suited to configuration property injection.
-For consistency with properties of other types, if you do declare an javadoc:java.util.Optional[] property and it has no value, `null` rather than an empty javadoc:java.util.Optional[] will be bound.
+If you do declare an javadoc:java.util.Optional[] constructor-bound property and it has no value, an empty javadoc:java.util.Optional[] will be bound.
 
 TIP: To use a reserved keyword in the name of a property, such as `my.service.import`, use the javadoc:org.springframework.boot.context.properties.bind.Name[format=annotation] annotation on the constructor parameter.