Merge branch '2.3.x'

Closes gh-23765

Author: snicoll

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

@@ -777,6 +777,8 @@ NOTE: You can only run one LiveReload server at a time.
 Before starting your application, ensure that no other LiveReload servers are running.
 If you start multiple applications from your IDE, only the first has LiveReload support.
 
+WARNING: To trigger LiveReload when a file changes, <<using-boot-devtools-restart>> must be enabled.
+
 
 
 [[using-boot-devtools-globalsettings]]