FEAT: export actions_macos in rest api /meta

[zoezhangmattr]

see the doc, https://docs.github.com/en/rest/meta/meta?apiVersion=2022-11-28
response schema includes

"actions_macos": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "examples": [
        "192.0.2.1"
      ]
    },

can we include it please.
the code https://github.com/google/go-github/blob/master/github/meta.go#L19

so that can resolve this integrations/terraform-provider-github#2607

[gmlewis]

Thank you, @zoezhangmattr!

This would be a great PR for any new contributor to this repo or a new Go developer.
All contributions are greatly appreciated!

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Please check out our CONTRIBUTING.md guide to get started. (In particular, please remember to go generate ./... and don't use force-push to your PRs.)

Thank you!

[CameronBadman]

Hi, I went ahead and gave it a quick write
#3535