change file name case

Author: insectengine

_data/events.yaml

@@ -36,5 +36,5 @@ upcomingevents:
   displaydate: "November 12, 2024"
   location: Salt Lake City
   description: AppDeveloperCon is designed for developers at all levels who are involved in the architecture, design, and development (using any programming language) of cloud-native applications.
-  thumbnail: AppDeveloperCon_logo.png
+  thumbnail: appdevelopercon_logo.png