Update message mangles links

[fallingcats]

As can be seen in this screenshot, the links are wrongly concatenated with the first word of the following phrase:

(href matches link text, it too is wrong).

Originally reported in #523, not sure why they closed the issue.

Additionally, this statement is wrong:

Alpha Innotec doesn't provide a changelog.
Please contact support for more information.

The changelog is available on the linked page (direct link: https://www.heatpump24.com/software/fetchSoftware.php?changeLog=2), it could probably be fetched and displayed automatically.

[kiall]

PR #533 should resolve the mangled text.

I also have the change log addition locally, but they only offer it in German (and use Google translate APIs in your browser for English etc)

[kiall]

PR #535 adds the ChangeLog