fix(ci): set NODE_AUTH_TOKEN to empty for OIDC publishing

semantic-release/npm#1069 — the plugin's OIDC token exchange succeeds
but npm publish fails with ENEEDAUTH because the temporary .npmrc
created by the plugin is empty. Setting NODE_AUTH_TOKEN="" allows npm
to fall through to OIDC authentication.

Author: Mearman

.github/workflows/ci.yml

@@ -98,3 +98,4 @@ jobs:
       - run: npx semantic-release
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ""