fix(DB/Midsummer): Add missing slippery floor bunny.

[heyitsbench]

Changes Proposed:

This PR proposes changes to:

• [X] Database (creatures).

Issues Addressed:

• Closes unreported issue.

SOURCE:

The changes have been validated through:

• [X] Sniffs

Tests Performed:

This PR has been:

• [X] Tested in-game by the author.

How to Test AzerothCore PRs

When a PR is ready to be tested, it will be marked as [WAITING TO BE TESTED].

You can help by testing PRs and writing your feedback here on the PR's page on GitHub. Follow the instructions here:

http://www.azerothcore.org/wiki/How-to-test-a-PR

REMEMBER: when testing a PR that changes something generic (i.e. a part of code that handles more than one specific thing), the tester should not only check that the PR does its job (e.g. fixing spell XXX) but especially check that the PR does not cause any regression (i.e. introducing new bugs).

For example: if a PR fixes spell X by changing a part of code that handles spells X, Y, and Z, we should not only test X, but we should test Y and Z as well.

[Nyeriah]

GitHub looks stuck

[heyitsbench]

I broke Github, cool.

[Nyeriah]

Please try update the branch to see if it budges

[Kitzunu]

at least the labeler works :D