chore: add 0.28 and 0.29 releases

Author: sydorovdmytro

docs/_partials/vcluster_supported_versions.mdx

@@ -18,6 +18,18 @@ Versions not listed under End of Support (EOS) or End of Life (EOL) are consider
     </tr>
   </thead>
   <tbody>
+    <tr>
+      <td>v0.29</td>
+      <td>October 1, 2025</td>
+      <td>January 1, 2026</td>
+      <td>April 1, 2026</td>
+    </tr>
+    <tr>
+      <td>v0.28</td>
+      <td>September 8, 2025</td>
+      <td>December 8, 2025</td>
+      <td>March 8, 2026</td>
+    </tr>
     <tr>
       <td>v0.27</td>
       <td>August 12, 2025</td>