contributing: `pnpm i` with pnpm v9 after updating deps conflicts with nx

[maiieul]

If you pnpm i with pnpm v9 and above after updating a dependency, you'll get the following error:

TypeError: Cannot read properties of undefined (reading 'CYAN600')
  25 |
  26 |   options.style = options.style ?? ThemeStyle.SIMPLE;
> 27 |   options.primaryColor = options.primaryColor ?? ThemePrimaryColor.CYAN600;
     |                                                                    ^
  28 |
  29 |   options.borderRadius = options.borderRadius ?? ThemeBorderRadius['BORDER-RADIUS-0'];
  30 |

  at setupTailwindGenerator (src/generators/setup-tailwind/setup-tailwind-generator.ts:27:68)
  at Object.<anonymous> (src/generators/setup-tailwind/setup-tailwind-generator.spec.ts:83:33)

It has been reported already nrwl/nx#22481, but needs an MRE.

[shairez]

Solved by #872