chore: bump sigstore/cosign-installer from 3.7.0 to 3.8.1

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.7.0 to 3.8.1.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.7.0...v3.8.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-edge.yaml

@@ -27,7 +27,7 @@ jobs:
         run: git fetch --prune --unshallow
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.1
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
         with:

.github/workflows/release-charts.yaml

@@ -27,7 +27,7 @@ jobs:
         with:
           version: v3.12.2
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.1
 
       - name: Github registry login
         uses: docker/login-action@v3

.github/workflows/release.yaml

@@ -22,7 +22,7 @@ jobs:
         run: git fetch --prune --unshallow
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.1
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
         with: