Broken links in docs (round 2)

[jmaspons]

Describe the bug
There are multiple broken links in the docs after #1141

Minimal Working Example
Search for <a href="@ref in gh-pages branch (dev folder only):

S'han trobat 7 coincidències (7 marcades) a la carpeta Agents.jl/dev/
api/index.html: 7
  2:14226: as been evolved for, starting from the model&#39;s initial time.</p><p>See also <a href="@ref">Advanced stepping</a>.</p></div><a class="docs-sourcelink" target="_blank" href="https://github.co
 89:6787: gent &lt;: AbstractAgent</code></pre><p>The minimal agent struct for usage with <a href="@ref OSM.OpenStreetMapSpace"><code>OpenStreetMapSpace</code></a>. It has an additional field <code>pos::
 95:681: , as an agent can truly be at any possible point on an existing road.</p><p>Use <a href="@ref OSM.OSMAgent"><code>OSMAgent</code></a> for convenience.</p><p><strong>Obtaining map files</strong>
124:5983: (model::ABM)</code></pre><p>Return the size of the model&#39;s space. Works for <a href="@ref"><code>AbstractGridSpace</code></a> and <a href="#Agents.ContinuousSpace"><code>ContinuousSpace</co
125:1217: position</code></a>, but specialized for <code>GridSpaceSingle</code>. See also <a href="@ref"><code>isempty</code></a>.</p></div><a class="docs-sourcelink" target="_blank" href="https://github
131:4329: his map requires <code>network_type = :none</code> to be passed as a keyword to <a href="@ref OSM.OpenStreetMapSpace"><code>OpenStreetMapSpace</code></a>. The unit of distance used for this map
187:1595: e> will return the scheduled IDs.</li><li>Can be used by a user when performing <a href="@ref Advanced_scheduling">manual scheduling</a> in case <code>agent_step!</code> has not been configured

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