auto detect package manager to suggest update

Is your feature request related to a problem? Please describe.

󰀵  󱑍 10:19   warp-multi-sidebars    main !?+15 via  v22.13.0   9s 
 ➜  redocly preview

    ╔═══════════════════════════════════════════════════════╗
    ║                                                       ║
    ║  A new version of Redocly CLI (1.33.1) is available.  ║
    ║  Update now: `npm i -g @redocly/cli@latest`.          ║
    ║  Changelog: https://redocly.com/docs/cli/changelog/   ║
    ║                                                       ║
    ╚═══════════════════════════════════════════════════════╝

Describe the solution you'd like

maybe use which redocly to identify it

 ➜  which redocly                      
/Users/imbios/Library/pnpm/redocly

then update the recommendation to use the correct package manager

Describe alternatives you've considered

Additional context

No source file or test is named. Start by locating the CLI's available-version notification and reproduce it with a command installed through pnpm, then compare the detected installation path with the suggested update command. Done means the notification recommends the package manager that installed the CLI, including the npm example shown in the issue.