Merge pull request #1936 from jieyouxu/docs

Backlink to more team repo docs

Author: jackh726

README.md

@@ -47,7 +47,10 @@ from all the supported services.
 
 ## Documentation
 
+* [Threat model](docs/threat-model.md)
 * [TOML schema reference](docs/toml-schema.md)
+* [Team maintenance](https://forge.rust-lang.org/infra/team-maintenance.html).
+    * In particular, refer to [*Rules for changes to team repo*](https://forge.rust-lang.org/infra/team-maintenance.html#rules-for-changes-to-team-repo).
 
 ## Using the CLI tool