Fix some typos (#12)

Author: blokhin

README.md

@@ -40,7 +40,7 @@ page](https://optimade.org/#get-involved).
     general exercises)
 -   [Matthew Horton](https://github.com/mkhorton), *LBNL* (`pymatgen`
     exercise)
--   [Evgeny Blokhin](https://github.com/blokhin), *Tilde Informatics*
+-   [Evgeny Blokhin](https://tilde.pro), *Tilde Materials Informatics*
     (typos and bug fixes)
 -   [Cormac Toher](https://github.com/ctoher), *Duke University* (AFLOW
     exercise)

notebooks/exercises.ipynb

@@ -30,7 +30,7 @@
     "\n",
     "- [Matthew Evans](https://ml-evs.science), *UCLouvain* (repository and general exercises)\n",
     "- [Matthew Horton](https://github.com/mkhorton), *LBNL* (`pymatgen` exercise)\n",
-    "- [Evgeny Blokhin](https://github.com/blokhin), *Tilde Informatics* (typos and bug fixes)\n",
+    "- [Evgeny Blokhin](https://tilde.pro), *Tilde Materials Informatics* (typos and bug fixes)\n",
     "- [Cormac Toher](https://github.com/ctoher), *Duke University* (AFLOW exercise)\n",
     "- [Abhijith Gopakumar](https://github.com/tachyontraveler), *Northwestern U.* (OQMD exercise)\n",
     "- [Johan Bergsma](https://github.com/JPBergsma), *CECAM* (typos, testing and feedback)\n"