[core/database]Repair fishing spell result fish escape

http://www.wowwiki.com/Fishing_items

As of 3.1, there is no longer a minimum skill requirement to fish in any zone, and all casts will catch something and award a chance for a skill-up. However, if your skill level is too low for a zone, you will catch mostly junk items. The skill level required to guarantee "no junk" catches is equivalent to the old "no get away" level.

https://github.com/TrinityCore/TrinityCore/issues/12026