point repo references at only-cli/only-cli

The GitHub repo is renamed from oc to only-cli so the repo, the npm
package, and the skills.sh install path all share one name.

.github/workflows/publish.yml

@@ -1,6 +1,6 @@
 # Publishes to npm via OIDC trusted publishing: no token, no OTP prompt.
 # One-time setup on npmjs.com after the package exists: package settings,
-# Trusted Publisher, GitHub Actions, repository only-cli/oc, workflow
+# Trusted Publisher, GitHub Actions, repository only-cli/only-cli, workflow
 # file publish.yml. From then on, publishing a GitHub release ships to npm.
 name: publish