Update security config in samples

This commit updates security configuration in samples to:

- use AuthorizationFilter instead of FilterSecurityInterceptor
- update session creation policy in REST sample

spring-session-samples/spring-session-sample-boot-websocket/src/main/java/sample/config/WebSecurityConfig.java

@@ -54,7 +54,7 @@ public class WebSecurityConfig {
 	@Bean
 	SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
 		return http
-			.authorizeRequests((authorize) -> authorize
+			.authorizeHttpRequests((authorize) -> authorize
 				.requestMatchers(PathRequest.toStaticResources().atCommonLocations()).permitAll()
 				.anyRequest().authenticated()
 			)