Align test with upstream Spring Security change

Closes gh-41488

Author: philwebb

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-saml2-service-provider/src/test/java/smoketest/saml2/serviceprovider/SampleSaml2RelyingPartyApplicationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -49,8 +49,8 @@ void everythingShouldRedirectToLogin() {
 	void loginShouldHaveAllAssertingPartiesToChooseFrom() {
 		ResponseEntity<String> entity = this.restTemplate.getForEntity("/login", String.class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
-		assertThat(entity.getBody()).contains("/saml2/authenticate/simplesamlphp");
-		assertThat(entity.getBody()).contains("/saml2/authenticate/okta");
+		assertThat(entity.getBody()).contains("/saml2/authenticate?registrationId=simplesamlphp");
+		assertThat(entity.getBody()).contains("/saml2/authenticate?registrationId=okta");
 	}
 
 }