Update modernize-userinterface-site-pages-ui.md (SharePoint#4642)

grammar fix

Author: dem123-cthulu

docs/transform/modernize-userinterface-site-pages-ui.md

@@ -39,11 +39,11 @@ Upgrading from preview to beta is easy as explained in the [upgrade guide](https
 
 Below steps describe the high level flow of the solution:
 
-1. From any of the UI elements the users triggers the creation of a modern version of the selected wiki or web part page. This will be done by calling a "central" proxy page which is hosted in the modernization center site collection
+1. From any of the UI elements the user triggers the creation of a modern version of the selected wiki or web part page. This will be done by calling a "central" proxy page which is hosted in the modernization center site collection
 2. The "central" proxy page contains an SPFX web part that makes a call to an Azure AD secured Azure Function
 3. The Azure Function uses the SharePoint Modernization Framework to create a modern version of the page. This created modern version does contain a banner web part which provides the end user with the option to keep or discard the created page. Important to understand is that this modern page is a new page with name like migrated_oldpagename.aspx
 4. If the page is discarded, a feedback dialog is shown asking the user for a reason why the page was not good. This information is then stored in a central list in the modernization center site collection.
-5. If the users keeps the page then the modern page gets the name of the original page and the original page is renamed with an old_ prefix
+5. If the user keeps the page then the modern page gets the name of the original page and the original page is renamed with an old_ prefix
 
 ![page transformation architecture](media/modernize/pagetransformation_ui_8.png)