Clarify follow-on commit workflow

{
  "backend": {
    "author": {
      "email": "drschwabe@fastmail.com",
      "name": "Derrick Schwabe",
      "time": 1788483130
    },
    "commit": "git:sha1:fe14c2706375812a9a16fea60f3f63e5446fc5d1",
    "committer": {
      "email": "drschwabe@fastmail.com",
      "name": "Derrick Schwabe",
      "time": 1788483130
    },
    "manifest": "mmm-manifest:sha256:ec266a8d3dbad051bf14b5644be93ce4227bef575ba6e03d72c5080d61823441",
    "message": "Clarify follow-on commit workflow",
    "objectFormat": "sha1",
    "parents": [
      "git:sha1:c4682e56af54b99730870a1d835fc0a3f4049ce5"
    ],
    "ref": "refs/heads/master",
    "summary": "Clarify follow-on commit workflow",
    "tree": "git:sha1:44e5451909d072960d29f6e7c35c0483db6308b7",
    "type": "git"
  },
  "issuedAt": "2026-09-04T04:44:05.114Z",
  "previous": "mmm-revision:sha256:ced8355097fceea4d4c4e55689dff9f1d75e874ac5f2556635c161404ce14afd",
  "project": "mmm1np06566gf6u8fpyj84u2emf25l98qad36700d2nlep6jzqdknp8qkyd3xu",
  "protocol": "mmm/0-alpha",
  "sequence": 35,
  "type": "mmm/revision"
}