DSM-2025 Add Openbserve as a sponsor (#15493)

Co-authored-by: Josh Angolano <[email protected]>

Author: jangolano

content/events/2025-des-moines/sponsor.md

@@ -87,7 +87,7 @@ The best thing to do is send engineers to interact with the experts at devopsday
       <tr>
           <td class="label">Remaining Sponsorhips (First come first serve)</td>
           <td class="platinum">1 of 1</td>
-          <td class="gold">7 of 11</td>
+          <td class="gold">6 of 11</td>
           <td class="lanyard">0 of 1</td>
           <td class="silver">Unlimited</td>
       </tr>

data/events/2025/des-moines/main.yml

@@ -99,6 +99,8 @@ organizer_email: "[email protected]" # Put your organizer email address
 sponsors:
   - id: leantechniques
     level: gold
+  - id: openobserve
+    level: gold
   - id: principal
     level: gold
   - id: sourceallies