feat: add missing @bean annotations in security configuration README files

Author: VSat08

08-Spring Security/8.1-REST API Basic Security Configuration/README.md

@@ -155,6 +155,7 @@ Let’s secure an employee management REST API (`rest-api-spring-demo`) from the
  package com.example.restdemo.security;
 
  import org.springframework.context.annotation.Configuration;
+ import org.springframework.context.annotation.Bean;
  import org.springframework.http.HttpMethod;
  import org.springframework.security.config.annotation.web.builders.HttpSecurity;
  import org.springframework.security.core.userdetails.User;

08-Spring Security/8.2-Spring Security User Accounts Stored DB/README.md

@@ -224,6 +224,7 @@ Let’s enhance `rest-api-spring-seq-demo-with-db` to use database-stored user a
  import org.springframework.security.config.annotation.web.builders.HttpSecurity;
  import org.springframework.security.provisioning.JdbcUserDetailsManager;
  import org.springframework.security.web.SecurityFilterChain;
+ import org.springframework.context.annotation.Bean;
  import javax.sql.DataSource;
 
  @Configuration