Ideally when looking at a Home Assistant documentation page (including the integration pages), a last modified date would appear some place easy to find, like in the page footer.
This small improvement might help give users a clue if they are looking at a page that hasn’t been maintained in a while.
I like it. A small thing but very helpful.
Another idea might be to include the version number which was current when it was written.
Although in theory this sounds nice but this wouild be something automatic since nobody wants to fill this in all the time. Since the documentation is build from github automatic if there are any changes that are recursive (which can happen) then the changed date would be modified for evertything. Just mentioning a potential reason why it is not in there.