fix: add npm@11 for OIDC publish support

Author: nmccready

.github/workflows/publish.yml

@@ -20,6 +20,8 @@ jobs:
         with:
           node-version: '20.x'
           registry-url: 'https://registry.npmjs.org'
+      - name: Install npm 11+ (required for OIDC)
+        run: npm install -g npm@11
       - name: Install dependencies
         run: npm ci
       - name: Audit