CI: grant write on contents in publish-release

Fixes: 3118b80 ("CI: another attempt to fix CI breakage")

Author: stintel

.github/workflows/build-willow.yml

@@ -107,6 +107,7 @@ jobs:
     runs-on: ubuntu-22.04
     needs: build-willow-dist
     permissions:
+      contents: write
       packages: read
     steps:
       - name: download artifacts