Bug 10250: Fix typos in guided reports help file

Bug 10250: Fix typos in guided reports help file

This is a string patch that fixes typos in the guided reports
help file.

To test:

* Go to the guided reports page
* Click help
* Confirm text is right

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 96363fa1c3db4398890ece41e7cc19003c0c5133)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Trivial string patch.