Update CHANGELOG for new generics features in Swift 5.7
Update CHANGELOG for new generics features in Swift 5.7

benlangmuir/swift,glessard/swift,glessard/swift,apple/swift,roambotics/swift,JGiola/swift,benlangmuir/swift,roambotics/swift,JGiola/swift,roambotics/swift,JGiola/swift,roambotics/swift,glessard/swift,apple/swift,glessard/swift,apple/swift,benlangmuir/swift,apple/swift,ahoppen/swift,roambotics/swift,ahoppen/swift,JGiola/swift,glessard/swift,roambotics/swift,benlangmuir/swift,glessard/swift,ahoppen/swift,ahoppen/swift,JGiola/swift,benlangmuir/swift,benlangmuir/swift,apple/swift,apple/swift,ahoppen/swift,JGiola/swift,ahoppen/swift