[doc] add hint for pwsh users

[IITII]

• 0x will be recognized as "Integer literals" in windows pwsh, so we need a more cross-platform way
• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_numeric_literals?view=powershell-7.2

:scroll: Example code

#pwsh
PS > 0x
0
PS > npx 0x

  0x 5.4.1

  0x [flags] -- node [nodeFlags] script.js [scriptFlags]
#cmd
PS C:\Users\IITII> cmd
Microsoft Windows [版本 10.0.19044.2006]
(c) Microsoft Corporation。保留所有权利。

CMD > 0x

  0x 5.4.1

  0x [flags] -- node [nodeFlags] script.js [scriptFlags]

[RafaelGSS]

cc: @mcollina