Add new runner variable runner.arch

[fhammerl]

Why:

Adding runner.arch variable after actions/runner#1185 is merged.

What's being changed:

Context:

https://gha-docs-10389--add-runner-arc.herokuapp.com/en/actions/learn-github-actions/contexts#runner-context

Environment variable:

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• I have reviewed my changes in staging (look for the latest deployment event in your pull request's timeline, then click View deployment).
• For content changes, I have completed the self-review checklist.

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The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

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Source	Staging	Production	What Changed
content/actions/learn-github-actions/contexts.md	Modified	Original
content/actions/learn-github-actions/environment-variables.md	Modified	Original

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Duplicate of #

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[ramyaparimi]

@fhammerl
Thanks so much for opening a PR! I'll get this triaged for review ⚡

[lucascosti]

Thanks a lot for this PR, @fhammerl!

Before we merge it, I just wanted to double check: because these new variables are set by the runner app, I assume that this change isn't tied to specific GHES versions? i.e. a self-hosted runner attached to a GHES server will be able to use this environment variable after the runner app is next automatically updated on the runner machine, regardless of the GHES instance version?

[fhammerl]

Thanks a lot for this PR, @fhammerl!

Before we merge it, I just wanted to double check: because these new variables are set by the runner app, I assume that this change isn't tied to specific GHES versions? i.e. a self-hosted runner attached to a GHES server will be able to use this environment variable after the runner app is next automatically updated on the runner machine, regardless of the GHES instance version?

@lucascosti ☝️ that's correct, this is set in the runner. The change was shipped in runner v2.284.0. (afaik GHES 3.3 currently uses v2.283.3)
If a self-hosted runner (regardless of GHES or dotcom version) is that version or higher, runner.arch is available.

[lucascosti]

afaik GHES 3.3 currently uses v2.283.3

ah, ok. In that case, I'll add some versioning to make this available to GHES versions 3.4 and above 👍

[martin389]

Looks good in staging: 👍

• enterprise-cloud
• FPT

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