docs: fix formatting for make serve mention

Fix formatting for `make server` mention in getting-started doc.

Signed-off-by: Kairo Araujo <kairo.araujo@testifysec.com>

Author: Kairo Araujo

docs/dev/development/getting-started.rst

@@ -248,7 +248,7 @@ Bootstrapping the TUF Metadata Repository
 To enable PyPI Index Signing (`PEP 458 <https://peps.python.org/pep-0458/>`_),
 you have to first bootstrap the TUF metadata repository.
 
-Wait until `make serve` has finished, then run:
+Wait until ``make serve`` has finished, then run:
 
 .. code-block:: console