🌱 Bump imjasonh/setup-ko from 0.5 to 0.6 (#2231)

Bumps [imjasonh/setup-ko](https://github.com/imjasonh/setup-ko) from 0.5 to 0.6.
- [Release notes](https://github.com/imjasonh/setup-ko/releases)
- [Commits](ko-build/setup-ko@78eea08...ace48d7)

---
updated-dependencies:
- dependency-name: imjasonh/setup-ko
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/publishimage.yml

@@ -49,7 +49,7 @@ jobs:
          go-version: ${{ env.GO_VERSION }}
          check-latest: true
      - name: install ko
-       uses: imjasonh/setup-ko@78eea08f10db87a7a23a666a4a6fe2734f2eeb8d
+       uses: imjasonh/setup-ko@ace48d793556083a76f1e3e6068850c1f4a369aa
      - name: publishimage
        uses: nick-invision/retry@b4fa57557dda8c2f30bcb2d19372cc3237190f7f
        with: