doc: remove duplicate the from onboarding.md

PR-URL: #17733
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Vse Mozhet Byt <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Jon Moss <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>

Author: sreepurnajasti

doc/onboarding.md

@@ -107,7 +107,7 @@ onboarding session.
         (especially if it just has nits left).
   * Approving a change
     * Collaborators indicate that they have reviewed and approve of the
-        the changes in a pull request using Github’s approval interface
+        changes in a pull request using Github’s approval interface
     * Some people like to comment `LGTM` (“Looks Good To Me”)
     * You have the authority to approve any other collaborator’s work.
     * You cannot approve your own pull requests.