Bump sigstore/cosign-installer from 3.7.0 to 3.8.0 (#18147)

Author: dependabot[bot]

.github/workflows/docker.yml

@@ -30,7 +30,7 @@ jobs:
         run: docker buildx inspect
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.0
 
       - name: Checkout repository
         uses: actions/checkout@v4