adding not for adding notes

Signed-off-by: matttrach <matttrach@gmail.com>

docs/release/expanded/release_notes.md

@@ -40,6 +40,7 @@
       - if the commit is not in the comparison, try comparing the previous release tags
         - example: `https://github.com/k3s-io/k3s/compare/v1.25.0+k3s1...v1.25.2+k3s1`
         - the commit's merge issue should be listed in the release notes
+   1. if you are adding backports, make sure you are using the backport issues, not the one for master
 1. Verify component release versions
    - the list of components is completely static, someone should say something in the PR if we need to add to the list
      - Kubernetes, Kine, SQLite, Etcd, Containerd, Runc, Flannel, Metrics-server, Traefik, CoreDNS, Helm-controller, Local-path-provisioner