i18n: Update Occitan locale

[Mejans]

100% translated now

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[damencho]

There are lint errors that you need to fix.

[Mejans]

Hello,
what has to be changed?

[damencho]

Looking at the error they are not sorted.

You can use this to help you: https://github.com/jitsi/jitsi-meet/blob/master/resources/lang-sort.sh

[Mejans]

@damencho done! Thanks for the script, I will keep it locally!