fix typo in NEWS (#52652)

Typo from #52461.

NEWS.md

@@ -84,9 +84,9 @@ New library features
  write the output to a stream rather than returning a string ([#48625]).
 * `sizehint!(s, n)` now supports an optional `shrink` argument to disable shrinking ([#51929]).
 * New function `Docs.hasdoc(module, symbol)` tells whether a name has a docstring ([#52139]).
-* Passing an IOBuffer as a stdout argument for Process spawn now works as
+* Passing an `IOBuffer` as a stdout argument for `Process` spawn now works as
  expected, synchronized with `wait` or `success`, so a `Base.BufferStream` is
- no longer required there for correctness to avoid data-races ([#TBD]).
+ no longer required there for correctness to avoid data races ([#52461]).
 * After a process exits, `closewrite` will no longer be automatically called on
  the stream passed to it. Call `wait` on the process instead to ensure the
  content is fully written, then call `closewrite` manually to avoid