Bump imjasonh/setup-ko from 0.7 to 0.8

Bumps [imjasonh/setup-ko](https://github.com/imjasonh/setup-ko) from 0.7 to 0.8.
- [Release notes](https://github.com/imjasonh/setup-ko/releases)
- [Commits](ko-build/setup-ko@v0.7...v0.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/test-on-crc.yaml

@@ -22,7 +22,7 @@ jobs:
       uses: actions/checkout@v4
       with:
         ref: ${{ github.sha }}
-    - uses: imjasonh/setup-ko@v0.7
+    - uses: imjasonh/setup-ko@v0.8
     - name: Set up Go
       uses: actions/setup-go@v5
       with: