📝 swagger ui -> springdoc openapi ui 변경

backend/discovery/src/main/java/org/egovframe/cloud/discovery/SecurityConfig.java

@@ -38,6 +38,7 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
                 .headers().frameOptions().disable()
             .and()
                 .authorizeRequests()
+                .antMatchers("/actuator/?*").permitAll()
                 .anyRequest().authenticated()
             .and()
                 .httpBasic();