Merge pull request #385 from plotly/oct-2025-webinar

Change sidebar ad to Oct 2025 webinar

Author: red-patience

_includes/layouts/webinar_plug.html

@@ -1,5 +1,5 @@
 
-    <a href="https://plotly.com/webinars/rise-of-vibe-analytics?utm_medium=graphing_libraries&utm_campaign=rise_vibe_analytics&utm_content=sidebar" target="_blank">
-      <img src="https://images.prismic.io/plotly-marketing-website-2/aJ9rZKTt2nPbaXaM_riseofvibeanalytics_square.jpg?auto=format,compress"
-      style="width: 200px; height: 200px; position: fixed; bottom: 10px; left: 50px" alt="Register for Plotly Presents: The Rise of Vibe Analytics">
+    <a href="https://plotly.com/webinars/data-apps-publishing-playbook/?utm_medium=graphing_libraries&utm_campaign=plotly_publishing_playbook&utm_content=sidebar" target="_blank">
+      <img src="https://images.prismic.io/plotly-marketing-website-2/aNMW2J5xUNkB1CWg_PlotlyPublishingPlaybook.jpg?auto=format,compress"
+      style="width: 200px; height: 200px; position: fixed; bottom: 10px; left: 50px" alt="Register for Any App, Any Scale: The Plotly Publishing Playbook">
     </a>