chore(download): add optimize 3.12.0 to download page (#428)

* chore(download): add optimize 3.12.0 to download page

* fix production links

enterprise/content/download.md

@@ -3620,13 +3620,13 @@ To install the demo distribution, please download one of the following archives:
   </thead>
   <tbody>
     <tr class="well">
-      <td>3.11.5</td>
+      <td>3.12.0</td>
       <td>7.18+, 7.19+, 7.20+</td>
-      <td>8.8.0+</td>
+      <td>8.9.0+</td>
       <td>09.01.2024</td>
       <td>
-        <a class="btn btn-sm btn-default optimize-download" href="https://downloads.camunda.cloud/enterprise-release/optimize/3.11.5/camunda-optimize-3.11.5-demo.zip">zip</a>&nbsp;
-        <a class="btn btn-sm btn-default optimize-download" href="https://downloads.camunda.cloud/enterprise-release/optimize/3.11.5/camunda-optimize-3.11.5-demo.tar.gz">tar.gz</a>
+        <a class="btn btn-sm btn-default optimize-download" href="https://downloads.camunda.cloud/enterprise-release/optimize/3.12.0/camunda-optimize-3.12.0-demo.zip">zip</a>&nbsp;
+        <a class="btn btn-sm btn-default optimize-download" href="https://downloads.camunda.cloud/enterprise-release/optimize/3.12.0/camunda-optimize-3.12.0-demo.tar.gz">tar.gz</a>
       </td>
     </tr>
   </tbody>
@@ -3655,6 +3655,16 @@ To get the production distribution, please download one of the following archive
     </tr>
   </thead>
   <tbody>
+    <tr class="well">
+      <td>3.12.0</td>
+      <td>7.18+, 7.19+, 7.20+</td>
+      <td>8.9.0+</td>
+      <td>09.01.2024</td>
+      <td>
+        <a class="btn btn-sm btn-default optimize-download" href="https://downloads.camunda.cloud/enterprise-release/optimize/3.12.0/camunda-optimize-3.12.0-production.zip">zip</a>&nbsp;
+        <a class="btn btn-sm btn-default optimize-download" href="https://downloads.camunda.cloud/enterprise-release/optimize/3.12.0/camunda-optimize-3.12.0-production.tar.gz">tar.gz</a>
+      </td>
+    </tr>
     <tr class="well">
       <td>3.11.5</td>
       <td>7.18+, 7.19+, 7.20+</td>