Run CI/CD every 30 minutes

Author: JPGC04

.github/workflows/platformio-ci.yml

@@ -7,7 +7,7 @@ on:
     branches: [main]
   workflow_dispatch:
   schedule:
-  - cron: '0 0,12 * * *'  # Runs at 00:00 and 12:00 UTC every day
+  - cron: '*/30 * * * *'
 
 jobs:
   build: