ci(export-deploy): deploy from main instead of -stable

export scripts should be deployed for both dev and prod. No
anticipated divergence is expected between them is expected at this
point, so deploying from main makes sense

.github/workflows/export-deploy.yml

@@ -2,7 +2,7 @@ name: Exporter code deploy
 
 on:
   push:
-    branches: ['*-stable']
+    branches: [main]
     paths:
     - '.github/workflows/export-deploy.yml'
     - 'data-serving/scripts/export-data/**'