Fixed typographical error in schema

[TheSuperGamer20578]

Removed a singular letter

Checklist

• [ ] This PR has been tested
  • [ ] Everything still works
  • [ ] No major bugs have been made
    • [ ] I have listed minor bugs that have been added
• [x] I have listed all changes that this PR makes
• [x] This PR needs no further work
• [ ] Manual restart and/or configuration required post-merge
  • [ ] I have listed how to make bot work again post-merge
• [ ] README.md or other documentation will be updated by this PR

• [ ] This is a major change

• [x] This is a minor change

• [x] This is a bug fix

• [ ] This is an enhancement or new feature

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