Apply suggestions from code review

Co-authored-by: Daria Sukhonina <dariasukhonina@gmail.com>

Author: reddevilmidzy

src/rustc-driver/getting-diagnostics.md

@@ -7,12 +7,12 @@ otherwise be printed to stderr.
 
 To get diagnostics from the compiler,
 configure [`rustc_interface::Config`] to output diagnostic to a buffer,
-and run [`TyCtxt::typeck`] for each item (e.g. `tcx.ensure_ok().typeck(item_def_id)`).
+and run [`TyCtxtEnsureOk::typeck`] for each item (e.g. `tcx.ensure_ok().typeck(item_def_id)`).
 
 ```rust
 {{#include ../../examples/rustc-interface-getting-diagnostics.rs}}
 ```
 
 [`rustc_interface`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/index.html
 [`rustc_interface::Config`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/interface/struct.Config.html
-[`TyCtxt::typeck`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.TyCtxt.html#method.typeck
+[`TyCtxtEnsureOk::typeck`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/query/struct.TyCtxtEnsureOk.html#method.typeck