Description:
In the setup-python README and code comments in action.yml the architecture field only mentions x86 and x64, but elsewhere, GitHub Actions documentation says arm64 is a supported architecture across all GitHub-provided Actions. It seems like that is true, but the documentation here hasn't been updated.

If not supplying the architecture field, will setup-python still default to x64 even on an arm64 host? Because it looks like it will default to the arch of the host OS.

Action version:
v5.2.0

Platform:

• Ubuntu
• macOS
• Windows

It seems GitHub Actions provides hosted arm64 runners for all three platforms.

Runner type:

• Hosted
• Self-hosted

Tools version:
n/a, this is about documentation

Repro steps:
n/a, this is about documentation

Expected behavior:
n/a, this is about documentation

Actual behavior:
n/a, this is about documentation