Minor Spellings

Hi Vlad,

While translating came across a few spelling mistakes, just wanted to flag for you.

1. occured should be occurred (2 instances)
Permalink – https://translate.www.ads-software.com/projects/wp-plugins/user-role-editor/dev/en-ca/default?filters%5Bstatus%5D=either&filters%5Boriginal_id%5D=636823&filters%5Btranslation_id%5D=57242478
Permalink – https://translate.www.ads-software.com/projects/wp-plugins/user-role-editor/dev/en-ca/default?filters%5Bstatus%5D=either&filters%5Boriginal_id%5D=636821&filters%5Btranslation_id%5D=57242480

2. super-admininstrators should be super-administrators
Permalink – https://translate.www.ads-software.com/projects/wp-plugins/user-role-editor/dev/en-ca/default?filters%5Bstatus%5D=either&filters%5Boriginal_id%5D=636934&filters%5Btranslation_id%5D=57242508

Cheers