Update Spring Vault documentation links.

See gh-832

Author: mp911de

README.adoc

@@ -8,7 +8,7 @@ Vault can manage static and dynamic secrets such as application data, username/p
 
 For a comprehensive treatment of all the Spring Vault features, please refer to:
 
-* the https://docs.spring.io/spring-vault/docs/current/reference/html/[User Guide]
+* the https://docs.spring.io/spring-vault/reference/[User Guide]
 * the https://docs.spring.io/spring-vault/docs/current/api/[JavaDocs] have extensive comments in them as well.
 * the home page of https://projects.spring.io/spring-vault[Spring Vault] contains links to articles and other resources.
 * for more detailed questions, use https://stackoverflow.com/questions/tagged/spring-vault[Spring Vault on Stackoverflow].
@@ -19,13 +19,13 @@ Specifically for Spring applications:
 
 * JavaConfig for Vault Client
 * Retrieve secrets from Vault and initialize Spring Environment with remote property sources
-* Obtain https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.client-ssl[secrets] secured with SSL
-* https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.authentication.token[Token],
-https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.authentication.appid[AppId],
-https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.authentication.approle[AppRole],
-https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.authentication.clientcert[Client Certificate],
-https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.authentication.cubbyhole[Cubbyhole], and
-https://docs.spring.io/spring-vault/docs/current/reference/html/#vault.authentication.awsec2[AWS-EC2] authentication
+* Obtain https://docs.spring.io/spring-vault/reference/vault/client-support.html#vault.client-ssl[secrets] secured with SSL
+* https://docs.spring.io/spring-vault/reference/vault/authentication.html#vault.authentication.token[Token],
+https://docs.spring.io/spring-vault/reference/vault/authentication.html#vault.authentication.appid[AppId],
+https://docs.spring.io/spring-vault/reference/vault/authentication.html#vault.authentication.approle[AppRole],
+https://docs.spring.io/spring-vault/reference/vault/authentication.html#vault.authentication.clientcert[Client Certificate],
+https://docs.spring.io/spring-vault/reference/vault/authentication.html#vault.authentication.cubbyhole[Cubbyhole], and
+https://docs.spring.io/spring-vault/reference/vault/authentication.html#vault.authentication.awsec2[AWS-EC2] authentication
 * Bootstrap application context: a parent context for the main application that can be trained to do anything
 
 Spring Boot users can benefit from https://github.com/spring-cloud/spring-cloud-vault-config[Spring Cloud Vault Config], an optimized integration with Vault to provide encrypted Vault properties inside Spring Boot applications.