Fix OptionalLiveReloadServer create bean

Closes gh-8595

Author: akaGelo

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java

@@ -58,6 +58,7 @@ public class LocalDevToolsAutoConfiguration {
 	/**
 	 * Local LiveReload configuration.
 	 */
+	@Configuration
 	@ConditionalOnProperty(prefix = "spring.devtools.livereload", name = "enabled", matchIfMissing = true)
 	static class LiveReloadConfiguration {