Centre column update (#1594)

* Update centre column

Emphasise the HSF Seminar series in the centre

Remove old WG phrasing in the "what we do" column

* Improved phrasing

_layouts/main.html

@@ -62,41 +62,30 @@ <h2>Meetings</h2>
 
 
   <div class="col-lg-4">
-    <h2>JuliaHEP 2024</h2>
+    <h2>HSF Seminars</h2>
     <p>
-      JuliaHEP is back! After the successful 2023 event at ECAP last year, JuliaHEP
-      comes to CERN from 30 September to 4 October for the 
-      <a href="https://indico.cern.ch/e/juliahep2024">2024 edition</a>.
-    </p>
-    <p style="display: block; text-align: center">
-      <img src="{{ '/images/juliahep/juliaheplogo.png' | relative_url }}"
-      alt="HSF logo" style="width:33%; margin-left: auto; margin-right: auto;">
-    </p>
-    <p>
-      Registration and abstract submission are <emph>open</emph> until 6
-      September and places at the hackathon are limited. You can help advertise
-      the event with this <a
-      href="https://cernbox.cern.ch/s/utykrPvfhl2wUk5">poster.</a>
-    </p>
-    <p>
-      As part of the JuliaHEP event we will also have the very first <a
-      href="{{site.baseurl}}/meetings/hsf-seminars.html">HSF Seminar</a>, where Uwe Acosta will
-      present <a href="https://indico.cern.ch/event/1452314/"><em>Julia in
-      high-energy physics: a paradigm shift or just another tool?</em></a>
-    </p>
-    <p style="display: block; text-align: center">
-      <img src="{{ '/images/HSF-logo/hsf-logo-seminar.svg' | relative_url }}"
-      alt="HSF seminar logo" style="width:40%; margin-left: auto; margin-right: auto;">
+      We are starting a series of <a
+      href="{{site.baseurl}}/meetings/hsf-seminars.html">HSF Seminars</a>, to cover
+      topics of general interest for software in high-energy physics.
+      <p style="display: block; text-align: center">
+        <img src="{{ '/images/HSF-logo/hsf-logo-seminar.svg' | relative_url }}"
+        alt="HSF seminar logo" style="width:40%; margin-left: auto; margin-right: auto;">
+      </p>
+      In our very first seminar Uwe Acosta will introduce the discussion of <a
+      href="https://indico.cern.ch/event/1452314/"><em>Julia in high-energy
+      physics: a paradigm shift or just another tool?</em></a>
     </p>
   </div>
 
 
  <div class="col-lg-4">
  	<h2>Activities</h2>
-    	<p>We organise many activities, from our <a href="{{ '/what_are_WGs.html' | relative_url }}">working groups</a>,
-          to organising <a href="{{ '/events.html' | relative_url }}">events</a>, to supporting projects as
-          <a href="{{ '/projects.html' | relative_url }}">HSF projects</a>, and helping communication within the
-          community through our  <a href="{{ '/forums.html' | relative_url }}">discussion forums</a>
+    	<p>We organise many <a href="{{ '/what_are_activities.html' | relative_url
+    	}}">activities</a> and <a href="{{ '/events.html' | relative_url
+    	}}">events</a> and we support
+          <a href="{{ '/projects.html' | relative_url }}">HSF affiliated
+          projects</a>. We help communication within the community through our
+          <a href="{{ '/forums.html' | relative_url }}">discussion forums</a>
           and <a href="{{ '/technical_notes.html' | relative_url }}">technical notes</a>.
           </p>
       <p>The HSF can also write <a href="{{ '/organization/hsf-letters.html' | relative_url }}">letters