Align updates.xml with Joomla standard format

- Add php_minimum 8.1 to all update entries
- Simplify targetplatform version to '5.*'

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

updates.xml

@@ -24,7 +24,8 @@
     <tags><tag>development</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>
-    <targetplatform name='joomla' version='(5|6)\..*'/>
+    <targetplatform name='joomla' version='5.*'/>
+    <php_minimum>8.1</php_minimum>
   </update>
 
   <!-- 2. ALPHA — dev → alpha → -->
@@ -45,7 +46,8 @@
     <tags><tag>alpha</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>
-    <targetplatform name='joomla' version='(5|6)\..*'/>
+    <targetplatform name='joomla' version='5.*'/>
+    <php_minimum>8.1</php_minimum>
   </update>
 
   <!-- 3. BETA — dev → alpha → beta → -->
@@ -66,7 +68,8 @@
     <tags><tag>beta</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>
-    <targetplatform name='joomla' version='(5|6)\..*'/>
+    <targetplatform name='joomla' version='5.*'/>
+    <php_minimum>8.1</php_minimum>
   </update>
 
   <!-- 4. RC — dev → alpha → beta → rc → -->
@@ -87,7 +90,8 @@
     <tags><tag>rc</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>
-    <targetplatform name='joomla' version='(5|6)\..*'/>
+    <targetplatform name='joomla' version='5.*'/>
+    <php_minimum>8.1</php_minimum>
   </update>
 
   <!-- 5. STABLE — dev → alpha → beta → rc → version/XX → main -->
@@ -108,7 +112,8 @@
     <tags><tag>stable</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>
-    <targetplatform name='joomla' version='(5|6)\..*'/>
+    <targetplatform name='joomla' version='5.*'/>
+    <php_minimum>8.1</php_minimum>
   </update>
 
 </updates>