Apply suggestion from @hugovk

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: brettcannon

getting-started/setup-building.rst

@@ -1259,7 +1259,7 @@ in a clone of the CPython repository.
 
 The same caveats outlined above when running from a container image from GHCR
 also apply here.
-
+.. c_codespaces_end
 
 
 .. include:: ../links.rst