chore(deps): update sigstore/cosign-installer action to v3.8.2 (#905)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/push-helm-chart.yaml

@@ -73,7 +73,7 @@ jobs:
           exit 1
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.8.1
+        uses: sigstore/cosign-installer@v3.8.2
 
       - name: Login to GHCR Registry
         uses: docker/login-action@v3