Change link text in banners to be more accessible

[selfthinker]

When reading out of context, for example when using a screen reader, "find out what this means" is not very clear.

[edwardhorsford]

I'm not convinced this is an improvement.

It's introducing language (alpha) that people are unlikely to know. It makes the link more specific, but also more complex. Would like a content designer to review.

[selfthinker]

It doesn't introduce anything new, it already says "alpha" and the word "this" is exactly what is meant there.
Initially the whole sentence read:

Alpha This part of GOV.UK is being built - (link)find out what this means(/link)

[NickColley]

This looks good to me 👍 I've pinged to the content team...

[selfthinker]

I wasn't sure if there will still be feedback from the content team. But as there doesn't seem to be any, I will merge now.

[NickColley]

Thanks @selfthinker :)