python3-sphinx: upgrade 8.1.3 -> 8.2.1

python3-sphinx: upgrade 8.1.3 -> 8.2.1

Changelog: https://www.sphinx-doc.org/en/master/changes/8.2.html

License-Update: Update copyright year

Add roman-numerals-py to RDEPENDS to avoid the following error:

|     sphinx.errors.ExtensionError: Could not import extension sphinx.builders.latex (exception: No module named 'roman_numerals')

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>