add guard-patterns pr number

Author: max-niederman

text/0000-guard-patterns.md renamed to text/3637-guard-patterns.md

@@ -1,6 +1,6 @@
 - Feature Name: `guard_patterns`
 - Start Date: 2024-05-13
-- RFC PR: [rust-lang/rfcs#0000](https://github.com/rust-lang/rfcs/pull/0000)
+- RFC PR: [rust-lang/rfcs#3637](https://github.com/rust-lang/rfcs/pull/3637)
 - Rust Issue: [rust-lang/rust#0000](https://github.com/rust-lang/rust/issues/0000)
 
 # Summary