Fixed variable index typo in release script.
Fixed variable index typo in release script.

svagionitis/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,cedral/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,jt70471/aws-sdk-cpp,jt70471/aws-sdk-cpp,cedral/aws-sdk-cpp,awslabs/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,jt70471/aws-sdk-cpp,awslabs/aws-sdk-cpp,jt70471/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,aws/aws-sdk-cpp,jt70471/aws-sdk-cpp,awslabs/aws-sdk-cpp,aws/aws-sdk-cpp,svagionitis/aws-sdk-cpp,awslabs/aws-sdk-cpp,svagionitis/aws-sdk-cpp,cedral/aws-sdk-cpp,aws/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,svagionitis/aws-sdk-cpp,jt70471/aws-sdk-cpp,cedral/aws-sdk-cpp,aws/aws-sdk-cpp,cedral/aws-sdk-cpp,svagionitis/aws-sdk-cpp,svagionitis/aws-sdk-cpp,aws/aws-sdk-cpp,aws/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,cedral/aws-sdk-cpp