Fix letter casing of Spring Vault reference docs path

Author: mp911de

src/partials/version.hbs

@@ -47,7 +47,7 @@
                             <li><a href="https://docs.spring.io/spring-ldap/reference/">Spring LDAP</a></li>
                             <li><a href="https://docs.spring.io/spring-session/reference/">Spring Session</a></li>
                             <li><a href="https://docs.spring.io/spring-authorization-server/reference/">Spring Authorization Server</a></li>
-                            <li><a href="https://docs.spring.io/spring-Vault/reference/">Spring Vault</a></li>
+                            <li><a href="https://docs.spring.io/spring-vault/reference/">Spring Vault</a></li>
                             <li><a href="https://docs.spring.io/spring-security-kerberos/reference/">Spring Security Kerberos</a></li>
                           </ul>
                         </li>