fix pipeline

Author: jimchou-dev

tools/yaml-templates/build-app-host.yml

@@ -53,7 +53,7 @@ steps:
 
   - script: |
       sed -i '/^registry=/d' .npmrc
-      echo "registry=https://office.pkgs.visualstudio.com/ISS/_packaging/ISS_PublicPackages/npm/registry/" >> .npmrc
+      printf '\nregistry=https://office.pkgs.visualstudio.com/ISS/_packaging/ISS_PublicPackages/npm/registry/\n' >> .npmrc
       echo "always-auth=true" >> .npmrc
     displayName: 'Configure CFS-compliant npm registry for app hosting sdk'
     workingDirectory: '$(AppHostingSdkProjectDirectory)'