build(deps): bump ko-build/setup-ko from 0.7 to 0.8

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

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

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

.github/workflows/publish.yaml

@@ -76,7 +76,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "1.23"
-      - uses: ko-build/setup-ko@v0.7
+      - uses: ko-build/setup-ko@v0.8
         name: Setup ko
         env:
           KO_DOCKER_REPO: ko.local
@@ -122,7 +122,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "1.23"
-      - uses: ko-build/setup-ko@v0.7
+      - uses: ko-build/setup-ko@v0.8
         name: Setup ko
 
       - name: Login to DockerHub
@@ -204,7 +204,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "1.23"
-      - uses: ko-build/setup-ko@v0.7
+      - uses: ko-build/setup-ko@v0.8
         name: Setup ko
 
       - name: Login to DockerHub
@@ -251,7 +251,7 @@ jobs:
         with:
           username: postfinance
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - uses: ko-build/setup-ko@v0.7
+      - uses: ko-build/setup-ko@v0.8
         name: Setup ko
       - name: Run ko publish for docker.io
         env: