Third slug is same as second
Third slug is same as second

It seems the MySql `LIKE` operator won't properly handle input.
After some troubleshooting I encountered, that with the JSON operator `->` it will select the value *with* `"`-marks surrounded.

So having the column `slug` with content `{"en":"a-slug-1"}` the line `->orWhere($attribute, 'LIKE', $slug.$separator.'%')` won't match as mysql selects `slug->en` as `"a-slug-1"` and not as `a-slug-1`.

As I suppose this has been working some time (or with other Databases) I just added one additional line which resolves this issue but won't break anything for everyone not having this (strange) issue.
Laravel-Backpack/crud,Laravel-Backpack/crud,Laravel-Backpack/crud,Laravel-Backpack/crud