Merge pull request #334 from crazy-max/cagent-codeowners

chore: update CODEOWNERS for cagent

Author: crazy-max

.github/CODEOWNERS

@@ -2,6 +2,7 @@
 pkg/compose/*        @docker/compose-maintainers
 pkg/model/*          @docker/ai-models-infra
 pkg/buildx/*         @docker/build
+pkg/cagent/*         @docker/ai-agent-team
 pkg/containerd/*     @docker/engine
 pkg/docker-cli/*     @docker/engine
 pkg/docker-engine/*  @docker/engine