Add the new Scout Monitoring logo

Retain the old in case there's a reference to it.

Author: tim-schilling

src/_content/sponsors/scout-apm.md

@@ -4,8 +4,8 @@ level: Bronze
 name: Scout APM
 date: 2024-08-16
 logo:
-    filename: ScoutAPM_logo_rounded_square.png
-    orientation: portrait
+    filename: scout-monitoring-logo-horizontal.png 
+    orientation: landscape
 url:
     target: >-
         https://scoutapm.com/python-monitoring?utm_campaign=event_link&utm_medium=event&utm_source=djangocon