RSS release notes thumbnail test (#4474)

* RSS release notes thumbnail test

* Update blog-collector/2024-07-03.md

Author: kimsauce

blog-collector/2024-07-03.md

@@ -1,7 +1,7 @@
 ---
 title: Version 19.500-2
 hide_table_of_contents: true
-image: https://help.sumologic.com/img/sumo-square.png
+image: https://help.sumologic.com/img/sumologic-rss-preview.jpg
 authors:
 - url: https://help.sumologic.com/release-notes-collector/rss.xml
   image_url: /img/release-notes/rss-orange.png

blog-collector/2024-08-23.md

@@ -1,7 +1,7 @@
 ---
 title: Version 19.506-1
 hide_table_of_contents: true
-image: https://help.sumologic.com/img/sumo-square.png
+image: /img/sumologic-rss-preview.jpg
 authors:
 - url: https://help.sumologic.com/release-notes-collector/rss.xml
   image_url: /img/release-notes/rss-orange.png
@@ -16,4 +16,4 @@ In this release, we've enhanced the security and stability of the Collector with
 
 ### Bug Fix
 
-- Fixed the Docker duplication data re-ingestion issue.
+- Fixed the Docker duplication data re-ingestion issue.