Fix broken links

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>

README.adoc

@@ -2,7 +2,7 @@
 
 The Spring Authorization Server project, led by the https://spring.io/projects/spring-security/[Spring Security] team, is focused on delivering https://datatracker.ietf.org/doc/html/draft-ietf-oauth-v2-1-07#section-1.1[OAuth 2.1 Authorization Server] support to the Spring community.
 
-This project replaces the Authorization Server support provided by https://spring.io/projects/spring-security-oauth/[Spring Security OAuth].
+This project replaces the Authorization Server support provided by https://github.com/spring-attic/spring-security-oauth[Spring Security OAuth].
 
 == Feature Planning
 This project uses https://docs.github.com/en/issues/planning-and-tracking-with-projects/learning-about-projects/about-projects[GitHub Projects] to prioritize the feature roadmap and help organize the project plan.
@@ -16,7 +16,7 @@ https://tanzu.vmware.com/spring-runtime[Commercial support], which offers an ext
 
 == Getting Started
 The first place to start is to read the https://datatracker.ietf.org/doc/html/draft-ietf-oauth-v2-1-11[OAuth 2.1 Authorization Framework] to gain an in-depth understanding on how to build an Authorization Server.
-It is a critically important first step as the implementation must conform to the specification defined in the OAuth 2.1 Authorization Framework and the https://github.com/spring-projects/spring-authorization-server/wiki/OAuth-2.0-Specifications[related specifications].
+It is a critically important first step as the implementation must conform to the specification defined in the OAuth 2.1 Authorization Framework and the https://github.com/spring-projects/spring-authorization-server/wiki/OAuth2-and-OIDC-Specifications[related specifications].
 
 The second place to start is to become very familiar with the codebase in the following Spring Security modules: