Update src/compiler-debugging.md

Change to public abi

Co-authored-by: Tshepang Mbambo <hopsi@tuta.io>

Author: emmet-horgan

src/compiler-debugging.md

@@ -367,7 +367,7 @@ error: layout_of(&'a u32) = Layout {
 error: aborting due to previous error
 ```
 
-[`Layout`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_abi/struct.Layout.html
+[`Layout`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_public/abi/struct.Layout.html
 
 
 ## Configuring CodeLLDB for debugging `rustc`