improve wording

Author: Expander

README.md

@@ -70,14 +70,14 @@ Li_10((1,1)) = (0.999962,1.00199)
 Notes
 -----
 
-The implementation of the real dilogarithm is an adaption of
+The implementation of the real dilogarithm is an adaptation of
 [[arXiv:2201.01678](https://arxiv.org/abs/2201.01678)].
 
 The implementation of the complex dilogarithm is inspired by the
 implementation in [SPheno](https://spheno.hepforge.org/).
 
 The implementation of the general n-th order complex polylogarithm an
-adaption of [[arXiv:2010.09860](https://arxiv.org/abs/2010.09860)].
+adaptation of [[arXiv:2010.09860](https://arxiv.org/abs/2010.09860)].
 
 Citation
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