Sourcegraph Amp / Cody lineage: Self-service commit signing keys for GitHub and GitLab credentials

What the release notes say

Unblock Batch Change PRs with commit signing keys for your existing GitHub or GitLab credentials.
Signed-commit rules blocked the merge of pull requests that Batch Changes opened for you. You can now generate an SSH commit signing key for your existing GitHub or GitLab credential in Sourcegraph, without help from an administrator.
Go to Settings , Batch Changes , and Code Hosts . Click Generate signing key , and add the public key to your code host. Commits that Sourcegraph pushes for you from then on carry a Verified badge and pass the rule. Existing commits are not updated.