Fix sentence in README.md (#7662)
Fix sentence in README.md (#7662)

Fixed a sentence at line 34.
S-Bartfast/cgeo,cgeo/cgeo,rsudev/c-geo-opensource,matej116/cgeo,auricgoldfinger/cgeo,S-Bartfast/cgeo,rsudev/c-geo-opensource,auricgoldfinger/cgeo,tobiasge/cgeo,S-Bartfast/cgeo,tobiasge/cgeo,rsudev/c-geo-opensource,matej116/cgeo,matej116/cgeo,cgeo/cgeo,tobiasge/cgeo,cgeo/cgeo,cgeo/cgeo,auricgoldfinger/cgeo