Backport #23924 by @teauxfu
fixes a minor typo in the email templates page
Co-authored-by: alex <alexmw777@gmail.com>
| `approve` | The head comment of a approving review for a pull request. |
| `reject` | The head comment of a review requesting changes for a pull request. |
| `code` | A single comment on the code of a pull request. |
-| `assigned` | Used was assigned to an issue or pull request. |
+| `assigned` | User was assigned to an issue or pull request. |
| `default` | Any action not included in the above categories, or when the corresponding category template is not present. |
The path for the template of a particular message type is: