Update docs/source/whatsnew/v0.23.rst

Co-authored-by: Ruth Comer <10599679+rcomer@users.noreply.github.com>

docs/source/whatsnew/v0.23.rst

@@ -20,15 +20,15 @@ Features
 
 * @lgolston updated the shapefile readers and added documentation. (:pull:`2236`)
 
-* Ruth Comer turned the GridLiner into a matplotlib Artist making it easier to
+* Ruth Comer turned the ``GridLiner`` into a Matplotlib ``Artist`` making it easier to
   add and remove gridlines and fewer internal draws for better performance. (:pull:`2249`, :pull:`2252`)
 
 * The cartopy feature download script (useful for downloading Natural Earth Features
   for offline use) can be invoked within the package directly
   using :code:`python -m cartopy.feature.download`, or through the installed command
   line interface using :code:`cartopy-feature-download`. (:pull:`2263`)
 
-* The Stamen Maps API is no longer available. There is a new class StadiaMaps
+* The Stamen Maps API is no longer available. There is a new class ``StadiaMaps``
   that can be used to access the Stadia Maps API which contains the
   Stamen styled tiles. (:pull:`2269`)