fix typo

README.md

@@ -13,7 +13,7 @@ Based on our work in the following papers:
 [Bast H., Brosi P., Storandt S., Efficient Generation of Geographically Accurate Transit Maps (extended version), ACM TSAS, Vol. 5, No. 4, Article 25, 2019](http://ad-publications.informatik.uni-freiburg.de/ACM_efficient%20Generation%20of%20%20Geographically%20Accurate%20Transit%20Maps_extended%20version.pdf)
 [Bast H., Brosi P., Storandt S., Metro Maps on Octilinear Grid Graphs, EuroVis 2020](http://ad-publications.informatik.uni-freiburg.de/EuroVis%20octi-maps.pdf)
 [Bast H., Brosi P., Storandt S., Metro Maps on Flexible Base Grids, SSTD 2021](http://ad-publications.informatik.uni-freiburg.de/SSTD_Metro%20Maps%20on%20Flexible%20Base%20Grids.pdf).
-An approach for generating geographically accurate transit maps which appears to be similar to ours was described by Anton Dubreau in a [blog post](https://blog.transitapp.com/how-we-built-the-worlds-prettiest-auto-generated-transit-maps-12d0c6fa502f).
+An approach for generating geographically accurate transit maps which appears to be similar to ours was described by Anton Dubrau in a [blog post](https://blog.transitapp.com/how-we-built-the-worlds-prettiest-auto-generated-transit-maps-12d0c6fa502f).
 
 Also see our web demos [here](https://loom.cs.uni-freiburg.de/), [here](https://loom.cs.uni-freiburg.de/global), and [here](https://octi.cs.uni-freiburg.de).