Showing Changelog of the new available update in Updates page

[skyGtm]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

Describe the feature you want

After implementing this #6049.

I think it would be better to have :
Showing changelog after pressing the update check button from above issue (#6049). The changelog should be such that it shows all changes from installed version of the app to the latest available version of the app.
For example: If my current installed app version be 20.10 (and latest available be 21.2) so, on pressing the Update check button from '1', it should show changelog as follows:

Version 21.2 (Latest):
....(changelog here)
Version 21.0:
....(changelog here)
Version 20.11:
....(changelog here)
Version 20.10 (Installed):
....(changelog here) `

such that user of old version can still catchup the info about new features, bug fixes, etc. that he had missed.
And even if new update is not available, it should be still be able to show the changelog of currently installed version.

Is your feature request related to a problem? Please describe it

Additional context

How will you/everyone benefit from this feature?

I always come to this github page just to see the changelog for new version of the app. Showing the changelog "within the app" will also help people to know about if their requested features have been implemented or not, and reported bugs has been fixed or not.