ci(release): skip docs PR when CLI reference is unchanged

[doringeman]

The update-docs job now checks whether any files under cmd/cli/docs/reference/ changed between the previous and current release tags before opening a PR in docker/docs. If no CLI reference docs changed, all subsequent steps are skipped.

When the PR is created, the second require block that go get adds to go.mod (containing all transitive dependencies of model-runner) is stripped after vendoring, so the PR only contains the model-runner version bump in the existing require block.

Test run for unchanged files: https://github.com/docker/model-runner/actions/runs/23498364715/job/68385961940.

[gemini-code-assist]

Note

Gemini is unable to generate a review for this pull request due to the file types involved not being currently supported.

[sourcery-ai]

Hey - I've left some high level feedback:

• The AWK one-liner that strips the second require block in go.mod is fairly brittle (e.g., relies on exact require (...) formatting and ordering); consider using go mod edit or a small Go/scripted helper that programmatically removes the unwanted requirements so it’s more robust to future formatting changes.
• The gh api ... compare/${PREVIOUS_TAG}...${RELEASE_TAG} call will fail if either tag is missing or misaligned with the docker/model-runner repo; you may want a guard (or a try/catch-style fallback) so that a transient tag/compare issue doesn’t cause the whole release workflow to fail.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The AWK one-liner that strips the second `require` block in `go.mod` is fairly brittle (e.g., relies on exact `require (...)` formatting and ordering); consider using `go mod edit` or a small Go/scripted helper that programmatically removes the unwanted requirements so it’s more robust to future formatting changes.
- The `gh api ... compare/${PREVIOUS_TAG}...${RELEASE_TAG}` call will fail if either tag is missing or misaligned with the `docker/model-runner` repo; you may want a guard (or a try/catch-style fallback) so that a transient tag/compare issue doesn’t cause the whole release workflow to fail.

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