Bump sigstore/cosign-installer from 3.8.0 to 3.8.1 (#1142)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@c56c2d3...d7d6bc7)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

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

@@ -43,7 +43,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e #[email protected]
+        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a #[email protected]
 
       - name: Publish and Sign OCI Charts
         run: |

.github/workflows/image-publish.yml

@@ -96,7 +96,7 @@ jobs:
           echo "digest=$(docker inspect --format='{{index .RepoDigests 0}}' ghcr.io/${{ env.IMAGE_NAME }}:${{ steps.version-string.outputs.tag }})" >> "$GITHUB_OUTPUT"
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e # v3.8.0
+        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
       - name: Sign the images with GitHub OIDC Token
         env:
           DIGEST: ${{ steps.image-build.outputs.digest }}