Document that `github.action_repository` and `github.action_ref` are not promised for composite actions

[jsoref]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/actions/learn-github-actions/contexts#github-context

What part(s) of the article would you like to see updated?

| github.action_ref | string | For a step executing an action, this is the ref of the action being executed. For example, v2. |
| github.action_repository | string | For a step executing an action, this is the owner and repository name of the action. For example, actions/checkout. |

Need to specify that they are not promised to work for composite actions.

(This is bizarre, but this is the information I received from GitHub support)

Additional information

https://support.github.com/ticket/personal/0/2042233#tc-15297292650900

[cmwilson21]

👋 @jsoref - Thanks for opening an issue! And thanks for linking us to the support ticket.

I'll get this triaged for review! ⚡

[petergau]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/actions/learn-github-actions/contexts#github-context

What part(s) of the article would you like to see updated?

| github.action_ref | string | For a step executing an action, this is the ref of the action being executed. For example, v2. |

| github.action_repository | string | For a step executing an action, this is the owner and repository name of the action. For example, actions/checkout. |

Need to specify that they are not promised to work for composite actions.

(This is bizarre, but this is the information I received from GitHub support)

Additional information

https://support.github.com/ticket/personal/0/2042233#tc-15297292650900

[jsoref]

@cmwilson21 ?