Fixed a spelling mistake

README.md

@@ -17,7 +17,7 @@ GitLab is a GitHub like service that organizations can use to provide internal m
 
 The GitLab instance hosted by Skyward is available at [git.skywarder.eu](https://git.skywarder.eu).
 
-The repositories are organized in groups and subgroups. [Here](https://git.skywarder.eu/explore/groups) you can see the complete list of groups. The top levels groups are those of the departments and directly under are thos of the IPTs.
+The repositories are organized in groups and subgroups. [Here](https://git.skywarder.eu/explore/groups) you can see the complete list of groups. The top levels groups are those of the departments and directly under are those of the IPTs.
 
 The users can have different levels of permission over groups and repositories:
 - **Guest**: Only read access;