Images (<img>) with .align-center do not have margin-bottom

[nemesifier]

Problem

Image which have .align-center get their margin-bottom CSS property reset by this:

sphinx_rtd_theme/src/sass/_theme_rst.sass

Lines 207 to 208 in a039e52

	.align-center
	margin: auto

This looks like a regression introduced in one of the recent versions to me.

And hence have no margin-bottom.

Reproducible Project

https://github.com/openwisp/openwisp2-docs

.. image:: https://raw.githubusercontent.com/openwisp/openwisp-monitoring/docs/docs/cpu-load.png
    :target: https://raw.githubusercontent.com/openwisp/openwisp-monitoring/docs/docs/cpu-load.png
    :align: center

Error Logs/Results

Expected Results

Environment Info

• Python Version: 3.8.10
• Sphinx Version: 6.1.3
• RTD Theme Version: 1.2.0