Add missing r0 endpoint for legacy sso redirect.

Signed-off-by: Jason Volk <jason@zemos.net>

Author: jevolk

crates/ruma-client-api/src/session/sso_login_with_provider.rs

@@ -23,8 +23,8 @@ pub mod v3 {
         rate_limited: false,
         authentication: None,
         history: {
-            unstable => "/_matrix/client/unstable/org.matrix.msc2858/login/sso/redirect/{idp_id}",
-            1.1 => "/_matrix/client/v3/login/sso/redirect/{idp_id}",
+           1.0 => "/_matrix/client/r0/login/sso/redirect/{idp_id}",
+           1.1 => "/_matrix/client/v3/login/sso/redirect/{idp_id}",
         }
     };