docs: add netlify build hook

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

.github/workflows/docs.yml

@@ -0,0 +1,17 @@
+name: Docs
+
+on:
+  push:
+    tags:
+      - v*
+    paths:
+      - "docs/**"
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - run: curl -X POST "https://api.netlify.com/build_hooks/${{ secrets.DOCS_NETLIFY_BUILD_HOOK }}"