🌱 Bump imjasonh/setup-ko from 0.4 to 0.5 (#2096)

Bumps [imjasonh/setup-ko](https://github.com/imjasonh/setup-ko) from 0.4 to 0.5.
- [Release notes](https://github.com/imjasonh/setup-ko/releases)
- [Commits](ko-build/setup-ko@2c3450c...78eea08)

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

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

.github/workflows/publishimage.yml

@@ -48,7 +48,7 @@ jobs:
        with:
          go-version: ${{ env.GO_VERSION }}
      - name: install ko
-       uses: imjasonh/setup-ko@2c3450ca27f6e6f2b02e72a40f2163c281a1f675
+       uses: imjasonh/setup-ko@78eea08f10db87a7a23a666a4a6fe2734f2eeb8d
      - name: publishimage
        uses: nick-invision/retry@7f8f3d9f0f62fe5925341be21c2e8314fd4f7c7c
        with: