s/twitter/github/g on links

Author: tomkralidis

docs/presentations/foss4g2024/index.html

@@ -82,7 +82,7 @@ <h1>Project overview</h1>
 					<h1 style="background-color: white"><img src="../default/static/pygeoapi-logo-notrans.png" style="vertical-align: middle;"/></h1>
 					<ul>
 						<li><a href="https://geopython.github.io" target="_blank"><img width="60" height="60" src="static/geopython.png" alt="geopython.github.io" style="background: white; border-radius: 10px"/></a> A <a href="https://geopython.github.io">Geopython</a> project</li>
-						<li>Created by <a href="https://twitter.com/tomkralidis">Tom Kralidis</a> in 2018 on Valentine's Day with ❤️ </li>
+						<li>Created by <a href="https://github.com/tomkralidis">Tom Kralidis</a> in 2018 on Valentine's Day with ❤️ </li>
 						<li><a href="https://www.osgeo.org/projects/pygeoapi/">OSGeo Project</a></li>
 					</ul>
 				</section>
@@ -482,7 +482,7 @@ <h1>Swag!</h1>
 				<h2>Links</h2>
 				<ul>
 					<li>Home: <a href="https://pygeoapi.io" target="_blank">pygeoapi.io</a></li>
-					<li>Twitter: <a href="https://twitter.com/pygeoapi" target="_blank">twitter.com/pygeoapi</a></li>
+					<li>Mastodon: <a href="https://noc.social/@pygeoapi" target="_blank">noc.social/@pygeoapi</a></li>
 					<li>Docs: <a href="https://docs.pygeoapi.io" target="_blank">docs.pygeoapi.io</a></li>
 					<li>Demo: <a href="https://demo.pygeoapi.io" target="_blank">demo.pygeoapi.io</a></li>
 					<li>GitHub: <a href="https://github.com/geopython/pygeoapi" target="_blank">github.com/geopython/pygeoapi</a></li>
@@ -494,12 +494,12 @@ <h2>Links</h2>
 			<section>
 				<h1>Thank you!</h1>
 				<p>
-					<a href="https://twitter.com/tomkralidis">@tomkralidis</a>
-					<a href="https://twitter.com/francbartoli">@francbartoli</a>
-					<a href="https://twitter.com/tzotsos">@tzotsos</a>
-					<a href="https://twitter.com/pvangenuchten">@pvgenuchten</a>
-					<a href="https://twitter.com/justb4">@justb4</a>
-					<a href="https://twitter.com/JMendesDeJesus">@JMendesDeJesus</a>
+					<a href="https://github.com/tomkralidis">@tomkralidis</a>
+					<a href="https://github.com.com/xbartolone">@xbartolone</a>
+					<a href="https://github.com/kalxas">@kalxas</a>
+					<a href="https://github.com/pvgenuchten">@pvgenuchten</a>
+					<a href="https://github.com/justb4">@justb4</a>
+					<a href="https://github.com/jorgejesus">@jorgejesus</a>
 				</p>
 			</section>
 		</div>