chore(template): Bump sigstore/cosign-installer to 3.8.2

Author: Techassi

template/.github/workflows/build.yml.j2

@@ -370,7 +370,7 @@ jobs:
 
       # Recreate charts and publish charts and docker image.
       - name: Install cosign
-        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
+        uses: sigstore/cosign-installer@3454372f43399081ed03b604cb2d021dabca52bb # v3.8.2
       - name: Install syft
         uses: anchore/sbom-action/download-syft@f325610c9f50a54015d37c8d16cb3b0e2c8f4de0 # v0.18.0
       - name: Build Docker image and Helm chart
@@ -415,7 +415,7 @@ jobs:
       OCI_REGISTRY_SDP_CHARTS_USERNAME: "robot$sdp-charts+github-action-build"
     steps:
       - name: Install cosign
-        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
+        uses: sigstore/cosign-installer@3454372f43399081ed03b604cb2d021dabca52bb # v3.8.2
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with: