Add missing @Override

Closes gh-14043

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerWebSecurityConfiguration.java

@@ -35,6 +35,7 @@ class OAuth2ResourceServerWebSecurityConfiguration {
 	@ConditionalOnBean(JwtDecoder.class)
 	static class OAuth2WebSecurityConfigurerAdapter extends WebSecurityConfigurerAdapter {
 
+		@Override
 		protected void configure(HttpSecurity http) throws Exception {
 			http.authorizeRequests().anyRequest().authenticated().and().oauth2()
 					.resourceServer().jwt();