fix: ci trigger on push to main

Signed-off-by: Sam Gammon <sam@elide.ventures>

Author: sgammon

.github/workflows/build.ci.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - stable
-      - v3
+      - main
   pull_request:
     types: [opened, reopened, synchronize]
   merge_group: {}