docs(ctb): add versioning rules

[smartcontracts]

Description Adds versioning rules to the Bedrock contracts package.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 0abe7737283aa8ea370bfa4e7bb1fdaa91a22bd9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
@eth-optimism/contracts-bedrock	Patch
@eth-optimism/actor-tests	Patch
@eth-optimism/sdk	Patch
@eth-optimism/drippie-mon	Patch
@eth-optimism/message-relayer	Patch

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[mergify[bot]]

This PR has been added to the merge queue, and will be merged soon.

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This PR is next in line to be merged, and will be merged as soon as checks pass.