Update URLs in RFC

Author: oli-obk

text/3254-types-team.md

@@ -1,6 +1,6 @@
 - Feature Name: N/A
 - Start Date: 2022-04-12
-- RFC PR: [rust-lang/rfcs#0000](https://github.com/rust-lang/rfcs/pull/0000)
+- RFC PR: [rust-lang/rfcs#3254](https://github.com/rust-lang/rfcs/pull/3254)
 - Rust Issue: [rust-lang/rust#0000](https://github.com/rust-lang/rust/issues/0000)
 
 # Summary