Add refresh action

Adds action to "refresh" our doc examples on pushes to master or when
triggered manually.

Author: brettmortensen

.github/workflows/refresh.yml

@@ -0,0 +1,14 @@
+name: Refresh
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ master ]
+
+jobs:
+  Refresh:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Trigger refresh of docs examples
+      run: ${{ secrets.WEBHOOK_TRIGGERS }}