Merge pull request #3962 from element-hq/dependabot/github_actions/sigstore/cosign-installer-3.8.0

build(deps): bump sigstore/cosign-installer from 3.7.0 to 3.8.0

Author: sandhose

.github/workflows/build.yaml

@@ -220,7 +220,7 @@ jobs:
             type=sha
 
       - name: Setup Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.0
 
       - name: Set up Docker Buildx
         uses: docker/[email protected]