Fix for dev release workflow

.github/workflows/publish-dev-release.yml

@@ -2,7 +2,8 @@ name: Dev Build (GitHub Pages)
 
 on:
   push:
-    branches: [$default-branch]
+    branches:
+      - master
   workflow_dispatch:
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
@@ -36,11 +37,11 @@ jobs:
           download: https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/dev/deltagreen.zip
 
       - name: Copy system.json
-        run: mkdir dist && cp system.json dist/dev-system.json
+        run: mkdir -p dist/dev && cp system.json dist/dev/dev-system.json
 
       - name: Zip
         run: |
-          zip -r dist/deltagreen.zip . \
+          zip -r dist/dev/deltagreen.zip . \
             -x "packs/source/*" \
             -x "build/*" \
             -x ".*" \