update changelog
update changelog

ruisebastiao/FluentValidation,robv8r/FluentValidation,GDoronin/FluentValidation,glorylee/FluentValidation,mgmoody42/FluentValidation,regisbsb/FluentValidation,deluxetiky/FluentValidation,IRlyDontKnow/FluentValidation,olcayseker/FluentValidation,cecilphillip/FluentValidation