Fix invalid tag color in timeline

Pink has been removed as a color in gov-uk tags, and so whenever the timeline page loads with a school move log entry the user currently sees an error.
This change fixes this by using a supported color.

Author: samcoy3

app/components/app_timeline_component.rb

@@ -38,7 +38,7 @@ def render? = @items.present?
     "Triage" => "red",
     "VaccinationRecord" => "grey",
     "SchoolMove" => "orange",
-    "SchoolMoveLogEntry" => "pink"
+    "SchoolMoveLogEntry" => "orange"
   }.freeze
 
   def format_heading(item)