<div class="beta-label">
  <span class="beta">beta</span> This part of GOV.UK is being rebuilt - <a href="/help/beta"> find out what this means</a>
</div>

<div class="beta-label">
  <span class="beta">beta</span> This part of GOV.UK is being rebuilt &ndash; <a href="/help/beta"> find out what this means</a>
</div>

Use an en dash in the beta label.
Use an en dash in the beta label.

For consistency with the component from static
<https://github.com/alphagov/static/commit/c8e240491497>.

This is a quick fix, since I don’t have a lot of context around this
partial as compared to the component, so I don't know whether these are
intentionally separate implementations, or whether we should be updating
this code to use the component from `static`.
