Add GitHub fallback update server, update beta SHA-256

- Add secondary update server pointing to GitHub as fallback
- Update beta release SHA-256 hash to match actual build

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/templateDetails.xml

@@ -31,9 +31,12 @@
 -->
 <extension type="template" client="site" method="upgrade">
 	<updateservers>
-	  <server type="extension" name="MokoCassiopeia Updates" priority="1">
+	  <server type="extension" name="MokoCassiopeia Updates (Gitea)" priority="1">
 	    https://git.mokoconsulting.tech/MokoConsulting/MokoCassiopeia/raw/branch/main/updates.xml
 	  </server>
+	  <server type="extension" name="MokoCassiopeia Updates (GitHub)" priority="2">
+	    https://raw.githubusercontent.com/mokoconsulting-tech/MokoCassiopeia/main/updates.xml
+	  </server>
 	</updateservers>
 	<name>MokoCassiopeia</name>
 	<version>03.09.14</version>

updates.xml

@@ -59,7 +59,7 @@
     <downloads>
       <downloadurl type='full' format='zip'>https://git.mokoconsulting.tech/MokoConsulting/MokoCassiopeia/releases/download/beta/mokocassiopeia-03.09.14-beta.zip</downloadurl>
     </downloads>
-    <sha256>c2660acdf7389244462485f7ab4c286e9f851366a148acc16739a184576f7932</sha256>
+    <sha256>d2654fe1f0c2c83e4901aad775937dea07211096e0df886cff2a2b465d0e0840</sha256>
     <tags><tag>beta</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>