manpages/vfs_fruit: fruit:resource option misspelling

manpages/vfs_fruit: fruit:resource option misspelling

Due to a misspelling in the option parser in all Samba versions up to
and including 4.5.1 this options must be given "fruit:ressource", ie
with two "s".

Samba 4.6 will accept both the correct the correct and the wrong
spelling, Samba 4.7 onwards will only accept the correct
spelling.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12412

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>