chore(release): update extension alpha feeds to 0.2.21.0

Automated release snapshot update.

Author: github-actions[bot]

updates/extensions/bundled-manifest.xml

@@ -7,6 +7,6 @@
     <updatecheck codebase="https://cdn.browseros.com/extensions/agent-0.0.149.0.crx" version="0.0.149.0" />
   </app>
   <app appid="pjimfkbpehlcllblajnpfamdfjhhlgkc">
-    <updatecheck codebase="https://cdn.browseros.com/extensions/browserclaw-0.2.19.0.crx" version="0.2.19.0" />
+    <updatecheck codebase="https://cdn.browseros.com/extensions/browserclaw-0.2.21.0.crx" version="0.2.21.0" />
   </app>
 </gupdate>

updates/extensions/update-manifest.alpha.xml

@@ -7,6 +7,6 @@
     <updatecheck codebase="https://cdn.browseros.com/extensions/agent-0.0.149.0.crx" version="0.0.149.0" />
   </app>
   <app appid="pjimfkbpehlcllblajnpfamdfjhhlgkc">
-    <updatecheck codebase="https://cdn.browseros.com/extensions/browserclaw-0.2.19.0.crx" version="0.2.19.0" />
+    <updatecheck codebase="https://cdn.browseros.com/extensions/browserclaw-0.2.21.0.crx" version="0.2.21.0" />
   </app>
 </gupdate>