Updated notification (#98)

Updated the notification to inform users that this is a development preview of the site

Author: SociableSteve

assets/style/typography.css

@@ -55,6 +55,10 @@ h6,
   border: none;
 }
 
+a {
+  color: black;
+}
+
 @media screen and (width <= 700px) {
   /* 700px */
   .hero {

layouts/components/announcement.html

@@ -1,5 +1,10 @@
 <div class="announcement announcement-warning">
-    <svg xmlns="http://www.w3.org/2000/svg" width="19" height="18" viewBox="0 0 19 18" fill="none">
-      <path d="M9.50003 6.75V8.25M9.50003 11.25H9.50753M4.30387 14.25H14.6962C15.8509 14.25 16.5726 13 15.9952 12L10.7991 3C10.2217 2 8.77834 2 8.20099 3L3.00484 12C2.42749 13 3.14917 14.25 4.30387 14.25Z" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
-      </svg> <p>On March 8th, the Bioconductor Core Team will rename the default branch on `git.bioconductor.org` to `devel`. This change affects maintainers of packages.</p>
-</div>
+  <svg xmlns="http://www.w3.org/2000/svg" width="19" height="18" viewBox="0 0 19 18" fill="none">
+    <path
+      d="M9.50003 6.75V8.25M9.50003 11.25H9.50753M4.30387 14.25H14.6962C15.8509 14.25 16.5726 13 15.9952 12L10.7991 3C10.2217 2 8.77834 2 8.20099 3L3.00484 12C2.42749 13 3.14917 14.25 4.30387 14.25Z"
+      stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" />
+  </svg>
+  <p><a href="https://blog.bioconductor.org/posts/2023-06-22-website-redesign/" target="_blank">This site is a
+      development preview. As such the content and styling may not be final and is subject to change
+      before going into production. To see more information about the redesign click here.</a></p>
+</div>