Minor cleanup

CODEOWNERS is unnecessary.

Author: nhooyr

.github/CODEOWNERS.txt

@@ -3,7 +3,7 @@
 [![GitHub Release](https://img.shields.io/github/v/release/nhooyr/websocket?color=6b9ded&sort=semver)](https://github.com/nhooyr/websocket/releases)
 [![GoDoc](https://godoc.org/nhooyr.io/websocket?status.svg)](https://godoc.org/nhooyr.io/websocket)
 [![Coveralls](https://img.shields.io/coveralls/github/nhooyr/websocket?color=65d6a4)](https://coveralls.io/github/nhooyr/websocket)
-[![Actions Status](https://github.com/nhooyr/websocket/workflows/ci/badge.svg)](https://github.com/nhooyr/websocket/actions)
+[![CI Status](https://github.com/nhooyr/websocket/workflows/ci/badge.svg)](https://github.com/nhooyr/websocket/actions)
 
 websocket is a minimal and idiomatic WebSocket library for Go.