Capitalize Uber in kzap README
Capitalize Uber in kzap README so that I appear as contributor
kzap
===
-kzap is a plug-in package to hook uber's [zap](https://github.com/uber-go/zap)
+kzap is a plug-in package to hook Uber's [zap](https://github.com/uber-go/zap)
into a [`kgo.Logger`](https://pkg.go.dev/github.com/twmb/franz-go/pkg/kgo#Logger)
To use,
