contracts-bedrock: add changeset

A changeset was not included in the PR that added
`CrossDomainOwnable3`, so adding a changeset now.

https://github.com/ethereum-optimism/optimism/pull/4882

.changeset/soft-poets-juggle.md

+---
+'@eth-optimism/contracts-bedrock': patch
+---
+
+Trigger a release including CrossDomainOwnable3