[libadwaita/wip/sophie-h/pages-alpha4-link] doc: Fix link to alpha.4

[Sophie Herold <sophieherold src gnome org>]

commit 5a809774e4ce396c613f7f543ea792b2ec7e1306
Author: Sophie Herold <sophie hemio de>
Date:   Tue Nov 2 20:31:39 2021 +0000

    doc: Fix link to alpha.4

 doc/index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/doc/index.html b/doc/index.html
index 1302bbca..2135c3d1 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -48,7 +48,7 @@
         <li><a href="1.0.0-alpha.1/">1.0.0-alpha.1</a></li>
         <li><a href="1.0.0-alpha.2/">1.0.0-alpha.2</a></li>
         <li><a href="1.0.0.alpha.3/">1.0.0.alpha.3</a></li>
-        <li><a href="1.0.0.alpha.3/">1.0.0.alpha.4</a></li>
+        <li><a href="1.0.0.alpha.4/">1.0.0.alpha.4</a></li>
       </ul>
 
       <ul class="doclist">