Changelog v1.0.0 alpha2 (#136)

* Update changelog site

* Add v1.0.0-alpha2 changelog

Author: juujisai

site/content/docs/react/getting-started/changelog/index-ss.html

@@ -2,5 +2,8 @@
 ---
 
 <li class="mb-1 pl-[9px] text-[0.85rem]" data-te-spy-active>
+  <a href="#v1.0.0-alpha2">v1.0.0-alpha 2</a>
+</li>
+<li class="mb-1 pl-[9px] text-[0.85rem]">
   <a href="#v1.0.0-alpha1">v1.0.0-alpha 1</a>
 </li>