message: docs: simplify command used to populate permission tuturial code
diff: @@ -20,16 +20,10 @@ The source code is available here:
  1. Copy-paste the two folders into the plugins folder of your backstage application repository or run the following script from the root of your backstage application:
  ```bash
  - $ node -e "const{UrlReaders}=require('@backstage/backend-common');\
  - const{ConfigReader}=require('@backstage/config');\
  - const winston=require('winston');const{outputFile}=require('fs-extra');\
  - const path=require('path');const logger=winston.createLogger({level:'info',});\
  - const config=new ConfigReader({});(async function execute(){\
  - const reader=UrlReaders.default({logger,config});const files=await reader.readTree(\
  - 'https://github.com/backstage/backstage/tree/permission-docs\
  - /contrib/plugins');return Promise.all((await files.files()).map(async file=>\
  - file.path!=='README.md'&&outputFile(path.join(__dirname,'plugins',file.path),\
  - await file.content(),),),).catch(console.log)})()"
  + $ curl https://codeload.github.com/backstage/backstage/zip/refs/heads/master | \
  + tar -C plugins --strip-components=1 -xv \
  + backstage-master/contrib/plugins/todo-list \
  + backstage-master/contrib/plugins/todo-list-backend
  ```
  Your application structure should look something like this:
  