Merge pull request #6855 from karmada-io/dependabot/github_actions/sigstore/cosign-installer-4.0.0

Bump sigstore/cosign-installer from 3.10.0 to 4.0.0

Author: karmada-bot

.github/workflows/dockerhub-latest-image.yml

@@ -42,7 +42,7 @@ jobs:
         with:
           go-version-file: go.mod
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.10.0
+        uses: sigstore/cosign-installer@v4.0.0
         with:
           cosign-release: 'v2.2.3'
       - name: install QEMU

.github/workflows/dockerhub-released-image.yml

@@ -42,7 +42,7 @@ jobs:
         with:
           go-version-file: go.mod
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.10.0
+        uses: sigstore/cosign-installer@v4.0.0
         with:
           cosign-release: 'v2.2.3'
       - name: install QEMU