(AzureCXP) Fixed a minor typo

resolves MicrosoftDocs/azure-docs#122866

Author: ChaitanyaNaykodi-MSFT

articles/frontdoor/standard-premium/how-to-cache-purge.md

@@ -43,7 +43,7 @@ Review [caching with Azure Front Door](../front-door-caching.md) to understand h
    Cache purges for Azure Front Door are case-insensitive. Additionally, they're query string agnostic, which means to purge a URL purges all query-string variations of it. 
 
 > [!NOTE]
-> Cache purging can takes up to 10 mins to propagate across all Azure Front Door POP locations.
+> Cache purging can take up to 10 mins to propagate across all Azure Front Door POP locations.
 
 ## Next steps