Add Release 3.5 as LTS (#2689)

Signed-off-by: Bryan Boreham <[email protected]>

Author: bboreham

docs-config.ts

@@ -31,7 +31,7 @@ export default {
 
   // Long-term support versions configuration.
   ltsVersions: {
-    prometheus: ["2.53"],
+    prometheus: ["3.5"],
   },
 
   // Repositories for the downloads page. The order in this file is the

docs/introduction/release-cycle.md

@@ -38,9 +38,12 @@ having a Prometheus server maintained by the community.
         <tr class="danger">
             <td>Prometheus 2.45</td><td>2023-06-23</td><td>2024-07-31</td>
         </tr>
-        <tr class="success">
+        <tr class="danger">
             <td>Prometheus 2.53</td><td>2024-06-16</td><td>2025-07-31</td>
         </tr>
+        <tr class="success">
+            <td>Prometheus 3.5</td><td>2025-07-14</td><td>2026-07-31</td>
+        </tr>
     </tbody>
 </table>