Use substring instead of replaceFirst in OAuth2AuthorizationConsent

Closes gh-1222

Author: heartape

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/OAuth2AuthorizationConsent.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2022 the original author or authors.
+ * Copyright 2020-2023 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.
@@ -93,7 +93,7 @@ public Set<String> getScopes() {
 		Set<String> authorities = new HashSet<>();
 		for (GrantedAuthority authority : getAuthorities()) {
 			if (authority.getAuthority().startsWith(AUTHORITIES_SCOPE_PREFIX)) {
-				authorities.add(authority.getAuthority().replaceFirst(AUTHORITIES_SCOPE_PREFIX, ""));
+				authorities.add(authority.getAuthority().substring(AUTHORITIES_SCOPE_PREFIX.length()));
 			}
 		}
 		return authorities;