This commit simply renames the 'webpage' slide_category into 'article'.
Indeed, 'webpage' was confusing because it was leading you to believe that you
would have to link external content from another website.
While this slide_category instead lets you build an 'article' with content by
using our website builder.
The changes here are just renaming the slide_category and the labels, there
should not be any functional change.
Task-2510174
Part-of: odoo/odoo#71477
Aurélien Warnon
22d1743e26