chore: clarify contracts release process (#11529)

* chore: clarify contracts release process

* Update packages/contracts-bedrock/VERSIONING.md
Co-authored-by: Inphi <mlaw2501@gmail.com>

---------
Co-authored-by: Inphi <mlaw2501@gmail.com>

packages/contracts-bedrock/VERSIONING.md

@@ -75,8 +75,8 @@ To accommodate this, once contract changes are ready for governance approval, th
 - On the `develop` branch, bump the version of all contracts to their respective `X.Y.Z-rc.n`. The `X.Y.Z` here refers to the contract-specific versions, so it differs per-contract. The `-rc.n` begins as `-rc.1` for all contracts. Any `-beta.n` and `+feature-name` identifiers are removed at this point.
 - Branch off of `develop` and create a branch named `proposal/op-contracts/vX.Y.Z`. Here, `X.Y.Z` is the new version of the monorepo release.
   - Using the `proposal/` prefix signals that this branch is for a governance proposal, and intentionally does not convey whether or not the proposal has passed.
-- Open a PR into the `proposal/op-contracts/vX.Y.Z` branch that removes the `-rc.1` suffixes from all contracts.
-  - This is the commit hash that will be tagged as `op-contracts/vX.Y.Z-rc.1`, used to deploy the contracts, and proposed to governance.
+- Open a PR into the `proposal/op-contracts/vX.Y.Z` branch that removes the `-rc.1` suffixes from all contracts, and merge it into the `proposal/op-contracts/vX.Y.Z` branch.
+  - After merge, the new commit on the `proposal/op-contracts/vX.Y.Z` branch is the commit hash that will be tagged as `op-contracts/vX.Y.Z-rc.1`, used to deploy the contracts, and proposed to governance.
   - Sometimes additional release candidates are needed before proposal—see [Additional Release Candidates](#additional-release-candidates) for more information on this flow.
 - Once the governance approval is posted, any lock on contracts on `develop` is released.
 - Once governance approves the proposal, merge the proposal branch into `develop` and set the version of all contracts to the appropriate `X.Y.Z` after considering any changes made to `develop` since the release candidate was created.