Fix typo in libreoffice man page.
Fix typo in libreoffice man page.

Change-Id: Ieb3e74630e48feaf69f5d58e9b7eb57779033356
Reviewed-on: https://gerrit.libreoffice.org/2610
Reviewed-by: Björn Michaelsen <e7b7acdb701579ea6e93eb181deb22e8c89dcb50@canonical.com>
Tested-by: Björn Michaelsen <e7b7acdb701579ea6e93eb181deb22e8c89dcb50@canonical.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core