adds comment about using public NPM registry

Author: americk0

.github/workflows/build-and-test.yml

@@ -29,8 +29,13 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
+
+    # Note: if this step is failing due to authentication errors, it is likely because you regenerated the npm-shrinkwrap.json 
+    #   file while your local NPM was set to use the coxauto artifactory NPM registry. To fix this, locally delete your node_modules
+    #   folder and npm-shrinkwrap.json file, then run `npm i --registry=https://registry.npmjs.org/` to reinstall using public NPM
+    #   and then `npm shrinkwrap` to regenerate the npm-shrinkwrap.json file.
     - name: Install dependencies
-      run: npm ci --verbose
+      run: npm ci
     - run: npm run build --if-present
     - name: Run tests
       run: npm test -- --no-watch