Add Ionic 3 into the titles of the old docs

[rtpHarry]

Is your feature request related to a problem? Please describe.
Google has abstracted away the url with breadcrumbs and both the Ionic 3 and Ionic 4 documents all look the same now in the SERPs:

Describe the solution you'd like
Add Ionic 3 to the page titles of the old docs. Consider adding Ionic 4 into the new docs, although with with Ionic 5 coming up fast it seems that it just needs a way of differentiating the old content.

Describe alternatives you've considered
I have considered zero alternatives.

Additional context
Screenshot above. 5 points for anyone who can tell me which points at which? :)

[perrygovier]

You know, for the sake of search results, this is a good idea. Will fix