docs: fix typo in autodoc command (#707)

Fixed a typo where an additional grave character was added after the
autodoc command in `CONTRIBUTING.md`.

Signed-off-by: asterized <91648368+asterized@users.noreply.github.com>

Author: asterized

CONTRIBUTING.md

@@ -204,7 +204,7 @@ Running the autodoc session should automatically update these files, if there
 were any changes.
 
 ```sh
-uv run nox -s autodoc`
+uv run nox -s autodoc
 ```
 
 ### Building the documentation