fix: correct --sbom-dir flag description (file → directory)

[immanuwell]

--sbom-dir has been described as "Path to file where the SBOM will be written." since it landed in #822 — but the flag is clearly a directory, not a file.

How to reproduce:

ko build --help | grep sbom-dir
# Path to file where the SBOM will be written.  ← wrong

The impl literally does os.MkdirAll on the value and then drops files inside it:

// pkg/build/gobuild.go
sbomDir := filepath.Clean(dir)
os.MkdirAll(sbomDir, os.ModePerm)          // creates a dir
sbomPath := filepath.Join(sbomDir, ...)    // writes file inside it

Even the field is named SBOMDir and the flag is --sbom-dir lol.

Fix: one-word change in the flag description (file → directory) + regenerated docs via ./hack/update-codegen.sh. No behavior change.

./hack/presubmit.sh passes.

[Copilot]

Pull request overview

This pull request fixes an incorrect CLI help/flag description for --sbom-dir, clarifying that the flag value is a directory (not a file), and updates the generated reference docs accordingly.

Changes:

• Update the --sbom-dir flag help text from “Path to file …” to “Path to directory …”.
• Regenerate/update the CLI reference docs so all command pages reflect the corrected description.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/commands/options/build.go	Corrects the --sbom-dir cobra flag description to indicate a directory.
docs/reference/ko_build.md	Updates generated CLI docs for ko build to reflect the corrected --sbom-dir description.
docs/reference/ko_run.md	Updates generated CLI docs for ko run to reflect the corrected --sbom-dir description.
docs/reference/ko_resolve.md	Updates generated CLI docs for ko resolve to reflect the corrected --sbom-dir description.
docs/reference/ko_create.md	Updates generated CLI docs for ko create to reflect the corrected --sbom-dir description.
docs/reference/ko_apply.md	Updates generated CLI docs for ko apply to reflect the corrected --sbom-dir description.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.