docs(saml2): remove metadata section and add sample link to examples table

Removed the outdated 'Metadata' section per feedback, and moved the sample link into the 'Examples Matrix' table for better visibility and relevance.

Signed-off-by: snowykte0426 <[email protected]>

Author: snowykte0426

docs/modules/ROOT/pages/servlet/saml2/saml2-migration-guide.adoc

@@ -43,6 +43,7 @@ Both Spring Security and Spring Security SAML Extensions have examples for how t
 | Login & Logout | https://github.com/spring-projects/spring-security-samples/tree/main/servlet/spring-boot/java/saml2/login[Sample] |
 https://github.com/jzheaux/spring-security-saml-migrate/tree/main/login-logout[Sample]
 | Login using SAML Extension URLs | https://github.com/spring-projects/spring-security-samples/tree/main/servlet/spring-boot/java/saml2/custom-urls[Sample] | -
+| Metadata support | https://github.com/spring-projects/spring-security-samples/tree/main/servlet/spring-boot/java/saml2/refreshable-metadata[Sample] | -
 |===
 
 You can also see a showcase example in https://github.com/spring-projects/spring-security-saml/tree/main/sample[Spring Security SAML Extension]'s GitHub project.
@@ -55,15 +56,6 @@ According to the SAML specification, the HTTP-Redirect binding is not permitted
 Use HTTP-POST binding instead when configuring your identity provider.
 ====
 
-[[saml2-metadata]]
-== Metadata
-
-Support for metadata is currently quite simple. Additions to its functionality are under consideration.
-
-`RelyingPartyRegistrations` builds off of the existing multitenancy support and can derive multiple ``RelyingPartyRegistration``s from a single EntityDescriptor endpoint. These can then be paired with locally-configured relying party information as needed.
-
-For applications that require Spring Security SAML Extension’s refreshable metadata feature, please see https://github.com/spring-projects/spring-security-samples/tree/main/servlet/spring-boot/java/saml2/refreshable-metadata[the associated Spring Security sample] for how to add.
-
 [[saml2-unported]]
 == Unported Features