Update logos

Author: cplacani

assets/img/PythonBiellaGroup-no-backgrou.png

@@ -183,14 +183,12 @@ <h2>Supported by</h2>
             </header>
             <div>
                 <ul class="sponsors-logo">
-                    <li><a href="https://www.jetbrains.com/" title="JetBrains"><img src="assets/img/logo_jetbrains.png"></a></li>
-                    <li><a href="https://www.elastic.co/" title="elastic"><img src="assets/img/logo_elastic.png"></a></li>
+                    <li><a href="https://www.pycon.it/" title="PyCon Italia"><img src="assets/img/pycon22.png"></a></li>
+                    <li><a href="https://djangogirls.org/en/pyconitalia/" title="Django Girls Italia"><img src="assets/img/django-girls-italy.png"></a></li>
+                    <li><a href="https://linktr.ee/PythonBiellaGroup" title="Python Biella"><img src="assets/img/PythonBiellaGroup-no-backgrou.png"></a></li>
                     <li><a href="http://www.codemotionworld.com/" title="Codemotion"><img src="assets/img/logo_codemotion.png"></a></li>
-                    <li><a href="https://www.pycon.it/" title="PyCon Italia"><img src="assets/img/logo_pyconit.png"></a></li>
                     <li><a href="https://www.truelite.it/" title="Truelite Srl"><img src="assets/img/logo_truelite.png"></a></li>
                     <li><a href="http://www.genropy.org/" title="Softwell, core team di GenroPy"><img src="assets/img/logo_softwell.png"></a></li>
-                    <li><a href="https://www.oreilly.com/" title="O'reilly"><img src="assets/img/logo_oreilly.png"></a></li>
-                    <li><a href="https://www.microsoft.com/" title="Microsoft"><img src="assets/img/logo_microsoft.png"></a></li>
                 </ul>
             </div>
         </article>