Update main.yml

add duos to workflow

Author: Fishwaldo

.github/workflows/main.yml

@@ -53,7 +53,7 @@ jobs:
   build-image:
     strategy:
       matrix:
-        boards: [licheervnano, duo256]
+        boards: [licheervnano, duo256, duos]
     runs-on: ubuntu-latest
     needs: build-docker-image
     steps: