fix(docs): Update GitHub links (#647)

Updates user-facing links to point to the new organization. Does not
update references in source code (user-agent, dependency references),
as they should be handled separately.

Signed-off-by: sinus-x <14353790+sinus-x@users.noreply.github.com>

crates/delta/src/routes/mod.rs

@@ -216,7 +216,7 @@ fn custom_openapi_spec() -> OpenApi {
             }),
             license: Some(License {
                 name: "AGPLv3".to_owned(),
-                url: Some("https://github.com/revoltchat/delta/blob/master/LICENSE".to_owned()),
+                url: Some("https://github.com/stoatchat/stoatchat/blob/main/crates/delta/LICENSE".to_owned()),
                 ..Default::default()
             }),
             version: env!("CARGO_PKG_VERSION").to_string(),