reorder sponsor level list

Signed-off-by: Koray Oksay <[email protected]>

Author: koksay

data/events/2025/istanbul/main.yml

@@ -135,10 +135,10 @@ sponsors_accepted : "yes" # Whether you want "Become a XXX Sponsor!" link
 # unlimited sponsors, omit the max attribute or set it to 0. If you want to prevent all
 # sponsorship for a specific level, it is best to remove the level.
 sponsor_levels:
-  - id: gold
-    label: Gold
   - id: platinum
     label: Platinum
+  - id: gold
+    label: Gold
   - id: silver
     label: Silver
     max: 0 # This is the same as omitting the max limit.