Fix typos discovered by codespell

[cclauss]

Fix typos discovered by codespell - https://pypi.org/project/codespell

% codespell

CHANGELOG.rst:146: seperately ==> separately
CHANGELOG.rst:158: reciept ==> receipt
docs/source/advanced-usage.rst:59: seperately ==> separately

% codespell --write-changes

[Kriechi]

Thanks! 🎉