Update Code of Conduct project maintainer (#1278)
Update Code of Conduct project maintainer (#1278)

Motivation:

The code-of-conduct email address is out-of-date.

Modifications:

Update code-of-conduct email address to swift-server-conduct@group.apple.com

Result:

apple/swift-nio,apple/swift-nio,apple/swift-nio,apple/swift-nio,apple/swift-nio