CI: update publication flow.

Author: whitequark

.github/workflows/main.yaml

@@ -1,6 +1,7 @@
 on:
   push:
   pull_request:
+  workflow_dispatch:
 
 name: CI
 jobs:
@@ -20,28 +21,7 @@ jobs:
           name: dist
           path: dist/
 
-  deploy:
-    needs: build
-    if: ${{ github.repository == 'amaranth-lang/playground' && github.event_name == 'push' && github.event.ref == 'refs/heads/live' }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out repository
-        uses: actions/checkout@v4
-      - name: Download artifact
-        uses: actions/download-artifact@v4
-        with:
-          name: dist
-          path: dist/
-      - name: Publish artifact to the main Amaranth website
-        uses: JamesIves/github-pages-deploy-action@releases/v4
-        with:
-          folder: dist/
-          repository-name: amaranth-lang/amaranth-lang.github.io
-          ssh-key: ${{ secrets.PAGES_DEPLOY_KEY }}
-          branch: main
-          target-folder: play/
-
-  deploy-dev:
+  publish:
     needs: build
     if: ${{ github.event_name == 'push' && github.event.ref == 'refs/heads/main' }}
     runs-on: ubuntu-latest
@@ -62,4 +42,5 @@ jobs:
         uses: JamesIves/github-pages-deploy-action@releases/v4
         with:
           folder: dist/
+          branch: ${{ github.repository == 'amaranth-lang/playground' && 'pages' || 'gh-pages' }}
           single-commit: true