change assignable user to pull request author

Author: Meaghan Lewis

docs/using/viewing-the-pull-requests-for-a-repository.md

@@ -10,7 +10,7 @@ GitHub for Visual Studio exposes the pull requests for the current repository an
 ![Pull requests in the GitHub pane](images/pull-request-list-view.png)
 5. Change the pull requests listed by clicking the **Open** link and selecting the filter you want to use from the dropdown with the options *Open/Closed/All*.
 ![Pull requests status dropdown filter](images/pull-request-list-filter.png)
-6. Filter pull requests by assignable user by clicking the person symbol and selecting the user you want to view from the dropdown. You can also search for users from the dropdown.
+6. Filter pull requests by author by clicking the person icon and selecting the user you want to view from the dropdown. You can also search for users from the dropdown.
 ![Pull requests assignable user dropdown filter](images/pull-request-assignable-user.png)
 7. Double-click anywhere in the pull request item to [view the pull request details and review the pull request](reviewing-a-pull-request-in-visual-studio.md)
 8. Click on the **Create New** link to [create a pull request from the current branch](creating-a-pull-request.md)