Auto merge of #10073 - russweas:patch-1, r=alexcrichton

Include note about bug while building on macOS in mdbook

See rust-lang/rust#90342. I can watch the thread and push another PR to delete this note once this bug is resolved.

src/doc/contrib/src/process/working-on-cargo.md

@@ -46,6 +46,11 @@ If you can successfully run `cargo build`, you should be good to go!
 
 [homebrew]: https://brew.sh/
 
+Note: There is currently a bug on arm64 M1 macOS machines that will cause an error 
+while linking cargo. To fix this, run `export MACOSX_DEPLOYMENT_TARGET=10.7` before 
+attempting to build the cargo project. For more information, see 
+[rust#90342](https://github.com/rust-lang/rust/issues/90342).
+
 ## Running Cargo
 
 You can use `cargo run` to run cargo itself, or you can use the path directly