DOCS - Clarify that pool size properties are ignored with task executor

#39529

Signed-off-by: Jakob Wanger <jakobwanger@gmail.com>

Author: wanger26

spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/task-execution-and-scheduling.adoc

@@ -37,8 +37,8 @@ This changes the thread pool to use a bounded queue so that when the queue is fu
 Shrinking of the pool is more aggressive as threads are reclaimed when they are idle for 10 seconds (rather than 60 seconds by default).
 
 A scheduler can also be auto-configured if it needs to be associated with scheduled task execution (using `@EnableScheduling` for instance).
-When virtual threads are enabled (using Java 21+ and configprop:spring.threads.virtual.enabled[] set to `true`) this will be a `SimpleAsyncTaskScheduler` that uses virtual threads.
-Otherwise, it will be a `ThreadPoolTaskScheduler` with sensible defaults.
+When virtual threads are enabled (using Java 21+ and configprop:spring.threads.virtual.enabled[] set to `true`) this will be a `SimpleAsyncTaskScheduler` that uses virtual threads..
+Otherwise, it will be a `ThreadPoolTaskScheduler` with sensible defaults. Note, the `SimpleAsyncTaskScheduler` will ignore any pool size properties.
 
 The `ThreadPoolTaskScheduler` uses one thread by default and its settings can be fine-tuned using the `spring.task.scheduling` namespace, as shown in the following example: