chore(deps): update sigstore/cosign-installer digest to b9a9af4

Author: renovate[bot]

.github/workflows/release.yaml

@@ -48,7 +48,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@29bcfa8619aeb12eaac78d31157172c86183b05c #pin@v3.7.0
+        uses: sigstore/cosign-installer@b9a9af4616125e37640447359ca8bd199a502d8d #pin@v3.7.0
 
       - name: Publish and Sign OCI Charts
         run: |