Change sidebar ad to July 2026 webinar

Author: red-patience

_includes/layouts/webinar_plug.html

@@ -1,5 +1,5 @@
 
-   <a href="https://plotly.com/dash-club/?utm_source=Dash%20Club%202022&utm_medium=graphing_libraries&utm_content=sidebar" target="_blank">
-     <img src="https://images.prismic.io/plotly-marketing-website-2/7953022d-73b1-481e-8f6b-9ce9bd80e588_Dash+Club.jpeg?auto=compress,format"
-     style="width: 200px; height: 200px; position: fixed; bottom: 10px; left: 50px" alt="Sign up to Dash Club to get two free cheat sheets as well as tips and tricks, community apps, and deep dives delivered every two months">
+   <a href="https://plotly.com/webinars/dash-enterprise-high-availability/?utm_source=graphing_libraries&utm_medium=documentation&utm_campaign=dash-enterprise-ha-br-14july2026&utm_content=sidebar" target="_blank">
+     <img src="https://images.prismic.io/plotly-marketing-website-2/aj7_GVbRV8_Qf7aM_dash-enterprise-high-availability.jpg?auto=format,compress"
+     style="width: 200px; height: 200px; position: fixed; bottom: 10px; left: 50px" alt="Sign up for the upcoming webinar: Resilient Deployments for Production Applications">
    </a>