add tutorial announcement

Author: mg69

content/assets/charmwebsite.css

@@ -76,6 +76,12 @@ body {
 	-moz-column-count: 2; -webkit-column-count: 2; column-count: 2;
 	margin: 2px 5em;
 }
+#announcements { 
+    margin-top: 1em;
+    padding-top: 1em;
+    border-top: 1px solid #cccccc; 
+}
+#announcements h3 { margin-bottom: 5px; }
 #portability {
 		-moz-column-count: 3; -webkit-column-count: 3; column-count: 3;
 }

layouts/homepage.html

@@ -142,6 +142,13 @@ <h5>adaptive runtime system</h5>
       						</li>
       				<a href="/progmodel/" style="float: right">more...</a>
       				</ul>
+					<div id="announcements">
+						<h3>Hybrid Tutorial 2023 Announcement</h3>
+						<p>
+							We will be having a hybrid tutorial at UIUC on Monday October 23rd and Tuesday October 24th. 
+							For more information and for registration, please follow this <a href="/workshops_and_tutorials/">link</a>.
+						</p>
+					</div>
       				<div id="capabilities">
       					<h3>capabilities</h3>
       					<ul>