Fix Private Spellcasting - Check All Prepared Slots

[7H3LaughingMan]

• Please check if the PR fulfills these requirements

• [x] We use semantic versioning (https://github.com/semantic-release/semantic-release to be specific), so follow https://github.com/angular/angular.js/blob/master/DEVELOPERS.md#-git-commit-guidelines.)

• [x] Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) Bug Fix

• What is the current behavior? (You can also link to an open issue here) Right now it checks only the prepared slots for the spell's rank. If a spell is auto-heightened or prepared in a higher slot this will cause issues since the spell in question might not be in spell slots that is being checked.

• What is the new behavior (if this is a feature change)? Checks all prepared slots for the spell.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?) No

[github-actions[bot]]

:tada: This issue has been resolved in version 6.8.1 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: