Inner class 'SpringBootWebFluxSecurityConfiguration' should be static

See gh-45882

Signed-off-by: Yanming Zhou <zhouyanming@gmail.com>

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/reactive/ReactiveSecurityAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -54,7 +54,7 @@ public class ReactiveSecurityAutoConfiguration {
 
 	@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
 	@Configuration(proxyBeanMethods = false)
-	class SpringBootWebFluxSecurityConfiguration {
+	static class SpringBootWebFluxSecurityConfiguration {
 
 		@Bean
 		@ConditionalOnMissingBean({ ReactiveAuthenticationManager.class, ReactiveUserDetailsService.class,