Fix typo
Fix typo

File was named `gradle.settings` in the doc, but it's `settings.gradle` in the repository.
matej116/cgeo,tobiasge/cgeo,pstorch/cgeo,rsudev/c-geo-opensource,auricgoldfinger/cgeo,pstorch/cgeo,samueltardieu/cgeo,Bananeweizen/cgeo,kumy/cgeo,tobiasge/cgeo,matej116/cgeo,SammysHP/cgeo,SammysHP/cgeo,SammysHP/cgeo,rsudev/c-geo-opensource,kumy/cgeo,matej116/cgeo,samueltardieu/cgeo,rsudev/c-geo-opensource,cgeo/cgeo,mucek4/cgeo,superspindel/cgeo,S-Bartfast/cgeo,cgeo/cgeo,auricgoldfinger/cgeo,pstorch/cgeo,superspindel/cgeo,Bananeweizen/cgeo,S-Bartfast/cgeo,mucek4/cgeo,S-Bartfast/cgeo,superspindel/cgeo,mucek4/cgeo,auricgoldfinger/cgeo,tobiasge/cgeo,kumy/cgeo,Bananeweizen/cgeo,cgeo/cgeo,cgeo/cgeo,samueltardieu/cgeo