WebHare changes in 5.5 and 5.6

[Arnold Hendriks]

Finally got around to adding the missing release notes for 5.5 - https://www.webhare.dev/reference-next/release-notes/5.5/

And added a preliminary version of the 5.6 release notes, which should be released soon - https://www.webhare.dev/reference-next/release-notes/5.6/

If I missed anything important, let me know