docs: update readme

Author: Helias

README.md

@@ -1,3 +1,23 @@
 # Python Catania 🌋🐘
 
 Python Catania 🌋🐘 static website.
+
+## Next Meetup GitHub Actions
+
+The homepage "Next Meetup" section is managed by two manually-triggered (`workflow_dispatch`) workflows.
+
+### Set Next Meetup
+
+Points the section at a specific Meetup event: sets the date, link, image, and title from the event page.
+
+- **GitHub UI:** Actions → **Set Next Meetup** → **Run workflow**, then paste the event URL (e.g. `https://www.meetup.com/python-catania/events/123456789/`).
+- **GitHub CLI:** `gh workflow run set-next-meetup.yml -f meetup_link="https://www.meetup.com/python-catania/events/123456789/"`
+
+### Default Next Meetup
+
+Resets the section to its generic default: generic image, generic title/description, no date, and the generic Meetup link.
+
+- **GitHub UI:** Actions → **Default Next Meetup** → **Run workflow**.
+- **GitHub CLI:** `gh workflow run default-next-meetup.yml`
+
+Both workflows commit the change and trigger a deploy automatically.