2024 Des Moines Adding additional sponsors (#14608)

Co-authored-by: Josh Angolano <jangolano@leantechniques.com>

Author: jangolano

data/events/2024/des-moines/main.yml

@@ -90,8 +90,12 @@ organizer_email: "des-moines@devopsdays.org" # Put your organizer email address
 # List all of your sponsors here along with what level of sponsorship they have.
 # Check data/sponsors/ to use sponsors already added by others.
 sponsors:
+  - id: crystaldb
+    level: silver
   - id: delta3
     level: silver
+  - id: harness
+    level: silver
   - id: jetbrains
     level: community
   - id: john-deere