UX: Skip github commit avatars for topic/post thumbnails (#12157)

UX: Skip github commit avatars for topic/post thumbnails (#12157)

GitHub oneboxes use .onebox-avatar-inline, not .onebox-avatar

diff --git a/lib/cooked_post_processor.rb b/lib/cooked_post_processor.rb
index a3046fb..d2d369f 100644
--- a/lib/cooked_post_processor.rb
+++ b/lib/cooked_post_processor.rb
@@ -209,6 +209,7 @@ class CookedPostProcessor
     @doc.css("img.site-icon") -
     # minus onebox avatars
     @doc.css("img.onebox-avatar") -
+    @doc.css("img.onebox-avatar-inline") -
     # minus github onebox profile images
     @doc.css(".onebox.githubfolder img")
   end

GitHub sha: 04c75d41

This commit appears in #12157 which was approved by CvX. It was merged by davidtaylorhq.