add charter link

team-policy.md

@@ -3,7 +3,7 @@
 This is a living document tracking the active policies of the style team. It is intended to fill a similar role to the books that many[^1] teams[^2] maintain[^3] independently[^4]. If in the future Rust establishes central linking/indexing/aggregating of policies, these will need to appear there.
 
 * **Original RFC**: https://rust-lang.github.io/rfcs/3309-style-team.html
-* **Charter**: TODO
+* **Charter**: https://github.com/rust-lang/fmt-rfcs/blob/master/charter.md
 
 ## Style Guide Evolution