Switch CODEOWNERS from sip to cli team (#105)

Author: jeremy

.github/CODEOWNERS

@@ -1,4 +1,4 @@
-* @basecamp/sip
-.goreleaser.yaml      @basecamp/sip
-.github/workflows/    @basecamp/sip
-scripts/release.sh    @basecamp/sip
+* @basecamp/cli
+.goreleaser.yaml      @basecamp/cli
+.github/workflows/    @basecamp/cli
+scripts/release.sh    @basecamp/cli