chore: Remove npm upgrade step from service_publish-node-package.yml

- Eliminated the npm upgrade step for OIDC trusted publishing, as it is no longer necessary for the workflow.
- This change streamlines the GitHub Actions workflow for publishing Node packages.

Author: jaydrogers

.github/workflows/service_publish-node-package.yml

@@ -29,10 +29,6 @@ jobs:
 
       - name: checkout
         uses: actions/checkout@v6
-
-      # Trusted publishing (OIDC) requires npm CLI >= 11.5.1 (Node images may ship older npm).
-      - name: Upgrade npm for OIDC trusted publishing
-        run: npm install -g npm@^11.5.1
 
       - name: Set NPM version (${{ github.ref_name }}).
         run: npm version --git-tag-version=false --commit-hooks=false ${{ github.ref_name }}