Fixes end quote on string; Updates README.md
Fixes end quote on string; Updates README.md

rthbound/WhatSunriseIsIt,rthbound/WhatIoIsIt,rthbound/WhatMercuryIsIt,rthbound/WhatSunsetIsIt,rthbound/WhatJupiterIsIt,rthbound/WhatMarsIsIt,rthbound/WhatGanymedeIsIt,rthbound/WhatVenusIsIt,rthbound/WhatMoonIsIt,rthbound/WhatEuropaIsIt,rthbound/WhatCallistoIsIt