Clarify ARM resources in README FAQ

[Xelu86]

Description

Updating README to clarify distinction between Azure resources & ARM resources on line 57. See #9967.

Example Usage

Checklist

• I have read and adhere to the contribution guide.

Microsoft Reviewers: Open in CodeFlow

[Xelu86]

#sign-off

[github-actions]

Test this change out locally with the following install scripts (Action run 29054464587)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 29054464587

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 29054464587"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 29054464587

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 29054464587"