Resolve "Bump rubocop to 1.68.0"

Daniel Prauserequested to merge
81-bump-rubocop-to-1-68-0 into master

What does this MR do and why?

This mr bumps rubocop to 1.68.0. since 1.67.0 is not working anymore with ruby-lsp 0.8.13. #81 (closed)

Closes #81 (closed)

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