Make all entries in "List of the Formulae Manuscripts" clickable, which are in the werkstatt

[tschomacker]

Supersedes Formulae-Litterae-Chartae/formulae-capitains-nemo#1059

In https://github.com/Formulae-Litterae-Chartae/formulae-capitains-nemo/blob/dev/templates/main/manuscript_siglen.html
All rows need to be modified. Here is an example:

<dl class="row">
    <dt class="col-10">
        Bern, Burgerbibliothek, 611
    </dt>
    <dd class="col font-weight-bold">Be<span class="manuscript-number">4</span></dd>
</dl>

modified to:

<dl class="row">
    <dt class="col-10">
        <a href="/corpus/urn:cts:formulae:be4">Bern, Burgerbibliothek, 611</a>
    </dt>
    <dd class="col font-weight-bold">Be<span class="manuscript-number">4</span></dd>
</dl>