[polly] [Polly] Fix typos discovered by codespell (PR #124545)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur approved this pull request.

LGTM, thank you

If you don't have push rights, please ping me and I will push the button for you.

https://github.com/llvm/llvm-project/pull/124545