Update tracking issue

Author: ehuss

text/0000-source_replacement_ambiguity.md

@@ -1,7 +1,7 @@
 - Feature Name: source_replacement_ambiguity
 - Start Date: 2022-07-05
 - RFC PR: [rust-lang/rfcs#3289](https://github.com/rust-lang/rfcs/pull/3289)
-- Rust Issue: [rust-lang/rust#0000](https://github.com/rust-lang/rust/issues/0000)
+- Tracking Issue: [rust-lang/cargo#10894](https://github.com/rust-lang/cargo/issues/10894)
 
 # Summary
 [summary]: #summary
@@ -125,4 +125,4 @@ Cargo's tests rely on the ability to replace the crates.io source and have the c
 
 Can't think of anything.
 
-[3139]: https://rust-lang.github.io/rfcs/3139-cargo-alternative-registry-auth.html
+[3139]: https://rust-lang.github.io/rfcs/3139-cargo-alternative-registry-auth.html