SAML: Document 2.0 as version (#22960)

Casually drops 2.0 in a couple of places in the docs so that a reader looking for information about supported SAML version can find it. Since SAML hasn't had any releases since 2005, we don't have to make a big deal out of it.

docs/sources/enterprise/saml.md

@@ -12,7 +12,7 @@ weight = 500
 
 # SAML authentication
 
-SAML authentication integration allows your Grafana users to log in by using an external SAML Identity Provider (IdP). To enable this, Grafana becomes a Service Provider (SP) in the authentication flow, interacting with the IdP to exchange user information.
+SAML authentication integration allows your Grafana users to log in by using an external SAML 2.0 Identity Provider (IdP). To enable this, Grafana becomes a Service Provider (SP) in the authentication flow, interacting with the IdP to exchange user information.
 
 The SAML single-sign-on (SSO) standard is varied and flexible. Our implementation contains the subset of features needed to provide a smooth authentication experience into Grafana.
 
@@ -20,7 +20,7 @@ The SAML single-sign-on (SSO) standard is varied and flexible. Our implementatio
 
 ## Supported SAML
 
-Grafana supports the following SAML integrations.
+Grafana supports the following SAML 2.0 bindings:
 
 * From the Service Provider (SP) to the Identity Provider (IdP):
   - `HTTP-POST` binding