Merge pull request #229 from joelsmith/kedamain

Update cosign-installer for main builds

Author: joelsmith

.github/workflows/main-build.yml

@@ -49,7 +49,7 @@ jobs:
 
       # https://github.com/sigstore/cosign-installer
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v2
+        uses: sigstore/cosign-installer@v3
 
       - name: Check Cosign install!
         run: cosign version