ci: explicitly set npm registry url for publishing (#2493)

Author: tido64

.github/actions/setup-toolchain/action.yml

@@ -76,6 +76,7 @@ runs:
       with:
         node-version: ${{ inputs.node-version }}
         cache: ${{ inputs.cache-npm-dependencies }}
+        registry-url: https://registry.npmjs.org
     - name: Set up Xcode
       if: ${{ inputs.xcode-developer-dir != '' }}
       run: |