Make Code Jam information page more discoverable

Make "Code Jams" a hyperlink on the main Events page
Add related links sidebar to Events page

Author: minalike

pydis_site/templates/events/index.html

@@ -8,7 +8,7 @@
 
 {% block event_content %}
     <div class="box">
-        <h2 class="title is-4">Code Jams</h2>
+        <h2 class="title is-4"><a href="{% url "events:page" path="code-jams" %}">Code Jams</a></h2>
         <div class="notification is-success">
           The <b>2022 Summer Code Jam</b> qualifier will open June 29th. Check out the details <a href="{% url "events:page" path="code-jams/9" %}">here</a>.
         </div>

pydis_site/templates/events/sidebar/events-list.html

@@ -8,3 +8,10 @@
         <li><a class="has-text-black" style="cursor: default;">December: Advent of Code</a></li>
     </ul>
 </div>
+
+<div class="box">
+    <p class="menu-label">Related Links</p>
+    <ul class="menu-list">
+        <li><a class="has-text-link" href="{% url "events:page" path="code-jams" %}">Code Jams</a></li>
+    </ul>
+</div>