Fix sphinx/build_docs warnings for data_structures/binary_tree/mirror_binary_tree#12470

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TheAlgorithms:masterTheAlgorithms/Python:masterfrom

MaximSmolskiy:fix-sphinx/build_docs-warning-for-data_structures/binary_tree/mirror_binary_treeMaximSmolskiy/Python:fix-sphinx/build_docs-warning-for-data_structures/binary_tree/mirror_binary_treeCopy head branch name to clipboard