Bug 30862: Typo: langues

Bug 30862: Typo: langues

This patch changes the word 'langues' to 'languages' in the description
of the following system preferences:

- OPACXSLTDetailsDisplay

- OPACXSLTListsDisplay

- OPACXSLTResultsDisplay

- XSLTDetailsDisplay

- XSLTListsDisplay

- XSLTResultsDisplay

To test:
1- Apply patch
2- Check the aforementioned system preferences and make sure the descriptions say 'languages'

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 58de13cb9a5efa3fd9c9fd50865eea62ee18ec5b)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>