fix(eslint-plugin): [dot-notation] fix typo in schema

[andrefilimono]

fixes #2042

[typescript-eslint]

Thanks for the PR, @andrefilimono!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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[codecov]

Codecov Report

Merging #2040 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2040   +/-   ##
=======================================
  Coverage   93.91%   93.91%           
=======================================
  Files         172      172           
  Lines        7843     7843           
  Branches     2253     2253           
=======================================
  Hits         7366     7366           
  Misses        217      217           
  Partials      260      260           

Flag	Coverage Δ
#unittest	93.91% <ø> (ø)

Impacted Files	Coverage Δ
packages/eslint-plugin/src/rules/dot-notation.ts	86.66% <ø> (ø)

[bradzacher]

thanks!