Update module github.com/go-sql-driver/mysql to v1.7.1

go.mod

go.sum

vendor/github.com/go-sql-driver/mysql/AUTHORS

vendor/github.com/go-sql-driver/mysql/CHANGELOG.md

vendor/github.com/go-sql-driver/mysql/README.md

vendor/github.com/go-sql-driver/mysql/connection.go

vendor/github.com/go-sql-driver/mysql/const.go

vendor/github.com/go-sql-driver/mysql/errors.go

vendor/modules.txt