Update CODEOWNERS

Remove baggagetrace entry and replace it with the missing entry for
baggagecopy.

Author: MrAlias

CODEOWNERS

@@ -56,7 +56,7 @@ instrumentation/net/http/httptrace/otelhttptrace/                       @open-te
 instrumentation/net/http/otelhttp/                                      @open-telemetry/go-approvers @dmathieu
 instrumentation/runtime/                                                @open-telemetry/go-approvers @MadVikingGod
 
-processors/baggage/baggagetrace                                         @open-telemetry/go-approvers @codeboten @MikeGoldsmith
+processors/baggagecopy                                                  @open-telemetry/go-approvers @codeboten @MikeGoldsmith
 processors/minsev                                                       @open-telemetry/go-approvers @MrAlias
 
 propagators/autoprop/                                                   @open-telemetry/go-approvers @MrAlias