add website deploy workflow

Author: jjw24

.github/workflows/website-deploy.yml

@@ -0,0 +1,17 @@
+name: Deploy Website
+
+on:
+  workflow_dispatch:
+
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dispatch event
+        run: |
+          curl -L \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.DEPLOY_TOKEN }}" \
+            https://api.github.com/repos/Flow-Launcher/flow-launcher.github.io/dispatches \
+            -d '{"event_type":"deploy"}'