update_from_5.0.md: Unduplicate v5.0.5 (fix #3069)

Author: adriendupuis

docs/update_and_migration/from_5.0/update_from_5.0.md

@@ -284,10 +284,6 @@ Run the provided SQL upgrade script to ensure the Messenger tables for [backgrou
     psql <database_name> < vendor/ibexa/installer/upgrade/db/postgresql/ibexa-5.0.4-to-5.0.5.sql
     ```
 
-## v5.0.5
-
-No additional steps needed.
-
 ## v5.0.6
 
 ### Database update [[% include 'snippets/experience_badge.md' %]] [[% include 'snippets/commerce_badge.md' %]]