Merge pull request Expensify#86004 from Expensify/helpsite-fix-typo

[No QA] Update Expense-Assistant.md

Author: kadiealexander

docs/articles/new-expensify/concierge-ai/Expense-Assistant.md

@@ -99,7 +99,7 @@ Some expense actions are not currently supported in chat, but may be added in th
 - Attaching a receipt to an existing transaction via chat
 - Tagging expenses based on past behavior 
 
-If you request these actions, Concierge will notify you that the feature is not yet available."
+If you request these actions, Concierge will notify you that the feature is not yet available.
 
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