Update readme.md

Author: juhanikataja

readme.md

@@ -30,7 +30,7 @@ T-Octree utilizes the following codes:
 - [Spectra C++ Library For Large Scale Eigenvalue Problems](https://spectralib.org) (included in `contrib/include` w/ it's own license)
 - [argparse](https://github.com/morrisfranken/argparse) (included in `contrib/include` w/ it's own license)
 
-## Acknoledgements
+## Acknowledgements
 
 This software library was built within project *Adaptive Strategies Towards Expedient Recovery In eXascale* (ASTERIX) at CSC – IT Center for Science Ltd. and University of Helsinki.
 Innovation Study ASTERIX has received funding through the Inno4scale project, which is funded by the European High-Performance Computing Joint Undertaking (JU) under Grant Agreement No 101118139. The JU receives support from the European Union's Horizon Europe Programme.