Update tracking issue

Author: ehuss

text/3424-cargo-script.md

@@ -2,7 +2,7 @@
 - Start Date: 2023-04-26
 - Pre-RFC: [internals](https://internals.rust-lang.org/t/pre-rfc-cargo-script-for-everyone/18639)
 - eRFC PR: [rust-lang/rfcs#3424](https://github.com/rust-lang/rfcs/pull/3424)
-- Rust Issue: [rust-lang/rust#0000](https://github.com/rust-lang/rust/issues/0000)
+- Tracking Issue: [rust-lang/cargo#12207](https://github.com/rust-lang/cargo/issues/12207)
 
 # Summary
 [summary]: #summary