Merge pull request #253 from plotly/july-2023-webinar-ad

Change sidebar ad to July 2023 webinar

Author: red-patience

_includes/layouts/webinar_plug.html

@@ -1,5 +1,5 @@
 
-    <a href="https://community.plotly.com/t/dash-chatgpt-app-challenge/75763?utm_medium=graphing_libraries&utm_content=sidebar" target="_blank">
-      <img src="https://images.prismic.io/plotly-marketing-website-2/08988d2e-5d58-4b5b-9433-e1267c5bc405_ChatGPT_app_challenge_image+%285%29.jpg?auto=compress,format"
-      style="width: 200px; height: 200px; position: fixed; bottom: 10px; left: 50px" alt="Join the Dash-ChatGPT App Challenge!">
+    <a href="https://go.plotly.com/analytics-pipelines?utm_source=Webinar%3A+Pairwise+7%2F20%2F23&utm_medium=graphing_libraries&utm_content=sidebar" target="_blank">
+      <img src="https://images.prismic.io/plotly-marketing-website-2/59258a75-d50b-4df6-bd86-f099bd92d0d0_Pairwise_square.jpg?auto=compress,format"
+      style="width: 200px; height: 200px; position: fixed; bottom: 10px; left: 50px" alt="Sign up for the upcoming webinar: Accelerate Analytics Pipelines for R&D with Dash Enterprise">
     </a>