fix: update cosign command and pin install (#53)

Author: joshua-stone

.github/workflows/build.yml

@@ -183,7 +183,7 @@ jobs:
             --disable-content-trust
 
       # Sign container
-      - uses: sigstore/cosign-installer@main
+      - uses: sigstore/cosign-installer@v3.0.1
 
       # Only needed when running `cosign sign` using a key
       - name: Write signing key to disk
@@ -203,7 +203,7 @@ jobs:
 
       - name: Sign container image
         run: |
-          cosign sign --key cosign.key ${{ steps.registry_case.outputs.lowercase }}/${{ steps.build_image.outputs.image }}@${TAGS}
+          cosign sign -y --key cosign.key ${{ steps.registry_case.outputs.lowercase }}/${{ steps.build_image.outputs.image }}@${TAGS}
         env:
           TAGS: ${{ steps.push.outputs.digest }}
           COSIGN_EXPERIMENTAL: false