Update ncipollo/release-action action to v1.21.0

Author: renovate[bot]

.github/workflows/publish.yml

@@ -195,7 +195,7 @@ jobs:
         path: out/SHA512SUMS.sign
 
     - name: Create GitHub release
-      uses: ncipollo/release-action@b7eabc95ff50cbeeedec83973935c8f306dfcd0b # v1.20.0
+      uses: ncipollo/release-action@339a81892b84b4eeb0f6e744e4574d79d0d9b8dd # v1.21.0
       with:
         allowUpdates: true
         artifactErrorsFailBuild: true