Update comments that reference refactored symbols

In vscode, you can click F2 to rename a module item. In some cases, the module item is referenced with square brackets in one of the comments. For example

// ... some where in your crate
//! This module uses [Builder] to do foo.


// ... else where
struct Builder {
 input_path: PathBuf,
 output_path: PathBuf
}

Later you decide to refactor Builder, for example, by giving it a more special name. You would want the comments that reference the Builder to be refactored, ideally. It would be nice for Rust-Analyzer to locate and update those references and update them when the code is refactored.

Start by reproducing the example in VS Code with Rust Analyzer: rename a module item using F2 when it is referenced in a square-bracketed comment. Define done as updating those comment references alongside the symbol rename, including the shown Builder example; the issue names no source files or tests to inspect.