Add Matplotlib 3.9.0 release announcement

Author: QuLogic

docs/body.html

@@ -121,17 +121,25 @@ <h1>Matplotlib: Visualization with Python</h1>
           <!-- optional important news -->
           <h3>News<a class="headerlink" href="#news" title="Permalink to news section">#</a></h3>
           <div class="news__item--highlight">
+            <h5 class="date">May 16, 2024</h5>
+            <a href="https://discourse.matplotlib.org/t/matplotlib-announce-ann-matplotlib-3-9-0/24444" class="link--offsite">Matplotlib 3.9.0 Released</a>
+            <p>
+             We thank the 175 authors for the 450 pull requests that comprise the 3.9.0 release.
+            </p>
+          </div>
+
+          <div class="news__item">
             <h5 class="date">Sept 15, 2023</h5>
             <a href="https://discourse.matplotlib.org/t/successful-completion-of-gsoc/24032" class="link--offsite">Successful GSOC 2023</a>
-            <p>  
+            <p>
              Thanks to Ratnabali Dutta's successful completion of GSOC, we have a number of <a href="https://devrd.github.io/posts/gsoc_fin">Mathtext improvements</a>.
             </p>
           </div>
 
           <div class="news__item">
             <h5 class="date">May 30, 2023</h5>
             <a href="https://discourse.matplotlib.org/t/gsoc-contributor-chosen/23850" class="link--offsite">Ratnabali Dutta chosen as GSOC contributor</a>
-            <p>  
+            <p>
               Thanks to the Google Summer of Code (GSOC) program, Ratnabali Dutta joins us this summer to work on improving our mathematical typesetting module <a href="https://matplotlib.org/stable/tutorials/text/mathtext.html">MathTex</a>.
             </p>
           </div>