message: Fixes documentation for spo file checkout
diff: @@ -32,5 +32,5 @@ m365 spo file checkout --webUrl https://contoso.sharepoint.com/sites/project-x -
  Checks out file with server-relative url _/sites/project-x/documents/Test1.docx_ located in site _https://contoso.sharepoint.com/sites/project-x_
  ```sh
  -m365 spo file checkout --webUrl https://contoso.sharepoint.com/sites/project-x --url '/sites/project-x/documents/Test1.docx'
  +m365 spo file checkout --webUrl https://contoso.sharepoint.com/sites/project-x --fileUrl '/sites/project-x/documents/Test1.docx'
  ```
  