Check for indentation of 3 spaces

[nkr0]

All reST files use an indentation of 3 spaces; no tabs are allowed.

https://devguide.python.org/documentation/markup/#use-of-whitespace

Personally, I also find 3 spaces better in RST files. Aligns directives, bullets, and enumerated lists.

.. directive::

   content

-  item1
-  item2

   -  subitem

#. item1
#. item2

   a. subitem1
   #. subitem2

These items may need 4 spaces, but they can be avoided. And 3 is suited for directives

(1) Use 1. ..

    (a) .. or a)

10. hopefully you can auto-enumerate..
11. ..or do not need sub-items.

[github-actions]

Label error. Requires exactly 1 of: breaking, build, chore, ci, docs, feat, fix, perf, refactor, style, test. Found: . Follow https://www.conventionalcommits.org to get auto-labeling to work correctly.