Fix typo in online publication production guide

scipost_django/guides/templates/guides/editorial/production/online_publication.html

@@ -30,7 +30,7 @@
 <li>Ensure that the author names are in format <code>[First name] [Last name]</code> namely: not just initials, full first name, so for example <code>Abe Bee, Cee Dee and Elle Fine</code> (unless the authors specifically request initials-only, as can be preferred in some cultures).</li>
 <li>Insert the correct Received, Accepted and Published dates in copyright statement.</li>
 <li>Between the <code>\begin{minipage}{0.4\textwidth}</code> and <code>%%%%%%%%%% TODO: DATES</code> lines, paste:</li>
-<pre><code>\noindent\begin{minipage}{0.68textwidth}</code></pre>
+<pre><code>\noindent\begin{minipage}{0.68\textwidth}</code></pre>
 <li>Update the DOI block to:</li>
 <pre><code>%%%%%%%%%% TODO: DOI
     }